Fair Value of Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Carrying value and estimated fair value of financial instruments

The Company’s Consolidated Balance Sheets reflect certain financial instruments at carrying value. The following table presents the carrying values of those instruments and the corresponding estimated fair values (in thousands):

	Estimated Fair Value Measurements at December 31, 2018
	Carrying Value as of December 31, 2018		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	31,255	$	31,255	$	31,255	$	—	$	—
Restricted cash and investments	53,217		53,217		50,499		2,718		—
Liabilities:
Borrowings under Senior Credit Facility	$	1,273,965	$	1,188,196	$	—	$	1,188,196	$	—
5.875% Senior Notes due 2024	250,000		224,590		—		224,590		—
5.125% Senior Notes	300,000		271,992		—		271,992		—
5.875% Senior Notes due 2022	250,000		244,550		—		244,550		—
6.00% Senior Notes	350,000		310,177		—		310,177		—
Non-recourse debt	340,910		348,274		—		348,274		—

	Estimated Fair Value Measurements at December 31, 2017
	Carrying Value as of December 31, 2017		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	81,377	$	81,377	$	81,377	$	—	$	—
Restricted cash	52,168		52,168		49,884		2,284		—
Liabilities:
Borrowings under Senior Credit Facility	$	1,064,599	$	1,070,514	$	—	$	1,070,514	$	—
5.875% Senior Notes due 2024	250,000		262,095		—		262,095		—
5.125% Senior Notes	300,000		303,918		—		303,918		—
5.875% Senior Notes due 2022	250,000		258,338		—		258,338		—
6.00% Senior Notes	350,000		362,835		—		362,835		—
Non-recourse debt	393,737		394,671		—		394,671		—