Fair Value of Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Carrying value and estimated fair value of financial instruments

The following tables present the carrying values of those financial instruments and the estimated corresponding fair values at March 31, 2019 and December 31, 2018 (in thousands):

			Estimated Fair Value Measurements at March 31, 2019
	Carrying Value as of March 31, 2019		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	67,728	$	67,728	$	67,728	$	—	$	—
Restricted cash and investments	56,077		56,077		53,148		2,929		—
Liabilities:
Borrowings under senior credit facility	$	1,311,175	$	1,252,400	$	—	$	1,252,400	$	—
5.875% Senior Notes due 2024	250,000		219,278		—		219,278		—
5.125% Senior Notes	300,000		266,034		—		266,034		—
5.875% Senior Notes due 2022	250,000		242,853		—		242,853		—
6.00% Senior Notes	350,000		294,914		—		294,914		—
Non-recourse debt	341,196		341,595		—		341,595		—

			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		49,884		2,284		—
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		—