5.	Other Assets

Other assets are as follows:

	December 31, 2016							December 31, 2015
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Deferred financing costs on undrawn revolver	$	967	$	(397	)	$	570	$	967	$	(204	)	$	763
Other regulatory assets:
Deferred financing costs		27,761		(16,997	)		10,764		27,112		(13,208	)		13,904
Deferred costs recoverable in future years		23,793		—			23,793		23,793		—			23,793
Other regulatory assets, net		51,554		(16,997	)		34,557		50,905		(13,208	)		37,697
Investments		2,519		—			2,519		2,519		—			2,519
Other assets	$	55,040	$	(17,394	)	$	37,646	$	54,391	$	(13,412	)	$	40,979

Deferred financing costs on undrawn revolver consist of costs incurred in connection with the establishment of the InfraREIT LP revolving credit facility, see Note 6, Borrowings Under Credit Facilities.

Other regulatory assets consist of deferred financing costs within the Company’s regulated subsidiary. These assets are classified as regulatory assets and amortized over the length of the related loan. These costs will be included in the costs to be recovered in connection with a future rate case. Deferred financing costs included in other regulatory assets primarily consist of debt issuance costs incurred in connection with the construction term loan agreement entered into in 2011 by SPLLC, which was at the time one of the Company’s subsidiaries; refinancing costs incurred in connection with the amended and restated revolving credit facility entered into by SDTS in 2013; refinancing costs incurred to amend and restate the SDTS credit facility in order to increase the revolving credit facility to a total of $250.0 million in 2014; and financing costs incurred in connection with SDTS’s senior secured notes, series A and series B in December 2015 and January 2016. See Note 6, Borrowings Under Credit Facilities and Note 7, Long-Term Debt.

Deferred costs recoverable in future years of $23.8 million at December 31, 2016 and 2015 represent operating costs incurred from inception of Sharyland through 2007. Recovery of these costs has been requested in the December Rate Case Filing. The Company has determined that these costs are probable of recovery through future rates based on orders of the PUCT in Sharyland’s prior rate cases and regulatory precedent. See Note 10, Regulatory Matters for additional information on the December Rate Case Filing.

In connection with the acquisition of Cap Rock Holding Corporation (Cap Rock), the Company received a participation in the National Rural Utilities Cooperative Finance Corporation (NRUCFC). The Company accounts for this investment under the cost method of accounting. The Company believes that the investment is not impaired at December 31, 2016 and 2015.