generation capacity in India. The program is expected to provide viability gap funding subsidies to the applicable solar power plants in the aggregate amount of INR 1,189.4 million, 50% of which is payable as early as three months after each power plant's commissioning, and 10% of which is payable each year for five years thereafter, subject to the plant meeting certain requirements. SECI is contractually obligated to establish an irrevocable letter of credit to secure its payment obligations.
The Company recorded the awarded viability gap funding as a reduction to the cost of power plants in service, with a $2.3 million and $10.7 million receivable included in current other assets, and $3.4 million and $7.1 million included in other assets, in the consolidated balance sheet as of December 31, 2016 and 2015, respectively. The current portion of the viability gap funding includes the initial 50% receivable following the solar power plant's commercial operation date and the 10% receivable in the first year thereafter. The initial 50% receivable was received in cash during 2016. The remaining receivable is expected to be received in the second quarter of 2017.
Impairment of Long-lived Assets
Long-lived assets that are held and used are reviewed for impairment whenever events or changes in circumstances indicate carrying values may not be recoverable. An impairment loss is recognized if the total future estimated undiscounted cash flows expected from an asset are less than its carrying value. An impairment charge is measured as the difference between an asset’s carrying amount and fair value with the difference recorded in operating costs and expenses in the statement of operations. Fair values are determined by a variety of valuation methods, including appraisals, sales prices of similar assets and present value techniques. There were no impairments of long-lived assets recognized during the years ended December 31, 2016, 2015 and 2014.
Intangible assets that have determinable estimated lives are amortized over those estimated lives. The straight-line method of amortization is used because it best reflects the pattern in which the economic benefits of the intangible asset are consumed or otherwise used up. The amounts and useful lives assigned to intangible assets acquired impact the amount and timing of future amortization. Reviews are performed to determine whether the carrying value of an asset is impaired, based on comparisons to undiscounted expected future cash flows or some other fair value measure. If this comparison indicates that there is impairment, the impaired asset is written down to fair value, which is typically calculated using discounted expected future cash flows utilizing an appropriate discount rate. Impairment is based on the excess of the carrying amount over the fair value of those assets. There were no impairments of intangible assets recognized during the years ended December 31, 2016, 2015 and 2014.
Deferred Financing Costs
Financing costs incurred in connection with obtaining construction and term financing are deferred and amortized over the maturities of the respective financing agreements using the effective-interest method. Amortization of deferred financing costs is capitalized during construction and recorded as interest expense in the consolidated statements of operations following commencement of commercial operation. Deferred financing costs capitalized for the year ended December 31, 2016 and 2015 were $0.0 million and $42.7 million, respectively. Amortization of deferred financing costs recorded as interest expense was $9.8 million, $21.2 million and $1.1 million during the years ended December 31, 2016, 2015 and 2014, respectively.
Asset Retirement Obligations
The Company operates under Power Purchase Agreements (“PPAs”) with a limited number of customers that include a requirement for the removal of the power plants at the end of the term of the agreement. Asset retirement obligations are recognized at fair value in the period in which they are incurred and the carrying amount of the related long-lived asset is correspondingly increased. Over time, the liability is accreted to its expected future value. The corresponding power plant is capitalized at inception and is depreciated over its useful life.
Power Purchase Agreements
The Company’s revenues are obtained through the sale of energy (based on megawatts, or "MW") pursuant to terms of PPAs or other contractual arrangements which have a weighted average remaining life of 17 years as of December 31, 2016. All PPAs are accounted for as operating leases, have no minimum lease payments and all of the rental income under these leases is recorded as revenue when the electricity is delivered.