CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Unaudited Statements Of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by (used in) operating activities			$ (27,188)	$ (67,390)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	$ (4,796)	$ (2,366)	(7,236)	(5,067)
Intercompany notes and accounts				0
Other investing activities, net				8,506
Net cash provided by investing activities			16,870	3,439
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt			(1,250)	(13,901)
Restricted cash			16,007	(18,605)
Payment of deferred financing costs			(350)	0
Repurchases of common stock			(54)	(164)
Intercompany notes and accounts				0
Other financing activities, net				(2,618)
Net cash provided by (used in) financing activities			14,353	(35,288)
Effect of changes in exchange rates on cash			144	(1,593)
Net increase (decrease) in cash and cash equivalents			4,179	(100,832)
Cash and cash equivalents, beginning of period			90,505	204,354
Cash and cash equivalents, end of period	$ 94,684	103,522	$ 94,684	103,522
Parent Company
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by (used in) operating activities				0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures				0
Intercompany notes and accounts				0
Other investing activities, net				0
Net cash provided by investing activities				0
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt				(13,901)
Restricted cash				(18,605)
Repurchases of common stock				(164)
Intercompany notes and accounts				(59,815)
Other financing activities, net				(2,618)
Net cash provided by (used in) financing activities				(95,103)
Effect of changes in exchange rates on cash				0
Net increase (decrease) in cash and cash equivalents				(95,103)
Cash and cash equivalents, beginning of period				191,065
Cash and cash equivalents, end of period		95,962		95,962
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by (used in) operating activities				(71,274)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures				(4,720)
Intercompany notes and accounts				59,815
Other investing activities, net				8,506
Net cash provided by investing activities				63,601
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt				0
Restricted cash				0
Repurchases of common stock				0
Intercompany notes and accounts				0
Other financing activities, net				0
Net cash provided by (used in) financing activities				0
Effect of changes in exchange rates on cash				0
Net increase (decrease) in cash and cash equivalents				(7,673)
Cash and cash equivalents, beginning of period				10,024
Cash and cash equivalents, end of period		2,351		2,351
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by (used in) operating activities				3,884
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures				(347)
Intercompany notes and accounts				0
Other investing activities, net				0
Net cash provided by investing activities				(347)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt				0
Restricted cash				0
Repurchases of common stock				0
Intercompany notes and accounts				0
Other financing activities, net				0
Net cash provided by (used in) financing activities				0
Effect of changes in exchange rates on cash				(1,593)
Net increase (decrease) in cash and cash equivalents				1,944
Cash and cash equivalents, beginning of period				3,265
Cash and cash equivalents, end of period		5,209		5,209
Eliminations
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Net cash provided by (used in) operating activities				0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures				0
Intercompany notes and accounts				(59,815)
Other investing activities, net				0
Net cash provided by investing activities				(59,815)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt				0
Restricted cash				0
Repurchases of common stock				0
Intercompany notes and accounts				59,815
Other financing activities, net				0
Net cash provided by (used in) financing activities				59,815
Effect of changes in exchange rates on cash				0
Net increase (decrease) in cash and cash equivalents				0
Cash and cash equivalents, beginning of period				0
Cash and cash equivalents, end of period		$ 0		$ 0