Fair Value of Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2016

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, 2016 and December 31, 2015 (in thousands):

			Estimated Fair Value Measurements at June 30, 2016
	Carrying Value as of June 30, 2016		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	38,865	$	38,865	$	38,865	$	—	$	—
Restricted cash and investments	80,016		80,016		75,160		4,856		—
Liabilities:
Borrowings under senior credit facility	$	741,000	$	741,728	$	—	$	741,728	$	—
5.875% Senior Notes due 2024	250,000		253,438		—		253,438		—
5.125% Senior Notes	300,000		292,500		—		292,500		—
5.875% Senior Notes due 2022	250,000		253,438		—		253,438		—
6.00% Senior Notes	350,000		351,313		—		351,313		—
Non-recourse debt, Australian subsidiary	366,164		366,120		—		366,120		—
Other non-recourse debt, including current portion	42,668		45,047		—		45,047		—

			Estimated Fair Value Measurements at December 31, 2015
	Carrying Value as of December 31, 2015		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	59,638	$	59,638	$	59,638	$	—	$	—
Restricted cash and investments	15,654		15,654		11,536		4,118		—
Liabilities:
Borrowings under senior credit facility	$	777,500	$	777,500	$	—	$	777,500	$	—
5.875% Senior Notes due 2024	250,000		245,783		—		245,783		—
5.125% Senior Notes	300,000		285,189		—		285,189		—
5.875% Senior Notes due 2022	250,000		248,125		—		248,125		—
6.625% Senior Notes	300,000		308,625		—		308,625		—
Non-recourse debt, Australian subsidiary	204,539		204,531		—		204,531		—
Other non-recourse debt, including current portion	42,592		43,353		—		43,353		—