Fair Value of Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2017

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 June 30, 2017 and December 31, 2016 (in thousands):

			Estimated Fair Value Measurements at June 30, 2017
	Carrying Value as of June 30, 2017		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	65,901	$	65,901	$	65,901	$	—	$	—
Restricted cash and investments	21,774		21,774		19,727		2,047		—
Liabilities:
Borrowings under senior credit facility	$	992,168	$	996,158	$	—	$	996,158	$	—
5.875% Senior Notes due 2024	250,000		259,930		—		259,930		—
5.125% Senior Notes	300,000		303,234		—		303,234		—
5.875% Senior Notes due 2022	250,000		260,793		—		260,793		—
6.00% Senior Notes	350,000		364,854		—		364,854		—
Non-recourse debt, Australian subsidiary	508,109		508,109		—		508,109		—
Other non-recourse debt, including current portion	36,680		37,555		—		37,555		—

			Estimated Fair Value Measurements at December 31, 2016
	Carrying Value as of December 31, 2016		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	68,038	$	68,038	$	68,038	$	—	$	—
Restricted cash and investments	22,319		22,319		19,614		2,705		—
Liabilities:
Borrowings under senior credit facility	$	804,500	$	795,008	$	—	$	795,008	$	—
5.875% Senior Notes due 2024	250,000		247,813		—		247,813		—
5.125% Senior Notes	300,000		292,125		—		292,125		—
5.875% Senior Notes due 2022	250,000		254,688		—		254,688		—
6.00% Senior Notes	350,000		346,938		—		346,938		—
Non-recourse debt, Australian subsidiary	454,222		454,185		—		454,185		—
Other non-recourse debt, including current portion	36,280		37,550		—		37,550		—