Unaudited Condensed Consolidated Statement of Stockholders' Equity - 6 months ended Jun. 30, 2016 - USD ($) shares in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Deferred Compensation Expense [Member]	Total
Balance at Dec. 31, 2015	$ 274,000	$ 417,289,000	$ 444,181,000	$ (96,234,000)	$ (75,922,000)	$ 8,720,000	$ 698,308,000
Balance (in shares) at Dec. 31, 2015					(2,543)
Net loss			(138,762,000)				(138,762,000)
Issuance of common stock	3,000	3,634,000					3,637,000
Treasury stock (in shares)					(8)
Treasury stock					$ 2,781,000		2,781,000
Deferred compensation plan		(2,994,000)			$ (16,000)	16,000	(2,994,000)
Deferred compensation plan (in shares)					(34)
Translation adjustment				(22,199,000)			(22,199,000)
Balance at Jun. 30, 2016	$ 277,000	$ 417,929,000	$ 305,419,000	$ (118,433,000)	$ (73,157,000)	$ 8,736,000	$ 540,771,000
Balance (in shares) at Jun. 30, 2016					(2,585)