Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2019 and December 31, 2018 (in thousands):

			Estimated Fair Value Measurements at September 30, 2019
	Carrying Value as of September 30, 2019		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	54,030	$	54,030	$	54,030	$	—	$	—
Restricted cash and investments	40,923		40,923		40,923		—		—
Liabilities:
Borrowings under senior credit facility	$	1,222,610	$	1,137,210	$	—	$	1,137,210	$	—
5.875% Senior Notes due 2022	216,023		209,519		—		209,519		—
5.125% Senior Notes due 2023	300,000		266,463		—		266,463		—
5.875% Senior Notes due 2024	250,000		217,488		—		217,488		—
6.00% Senior Notes due 2026	350,000		283,486		—		283,486		—
Non-recourse debt	325,313		325,428		—		325,428		—

			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 2022	250,000		244,550		—		244,550		—
5.125% Senior Notes due 2023	300,000		271,992		—		271,992		—
5.875% Senior Notes due 2024	250,000		224,590		—		224,590		—
6.00% Senior Notes due 2026	350,000		310,177		—		310,177		—
Non-recourse debt	340,910		348,274		—		348,274		—