CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common stock	Treasury stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (AOCI)	Non- controlling interests
Beginning balance at Dec. 31, 2013	$ 473,678	$ 43	$ (40,998)	$ 3,536,761	$ (3,045,685)	$ 40	$ 23,517
Beginning balance (in shares) at Dec. 31, 2013		43,333,000	(5,118,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation expense related to stock appreciation rights (SARs) and stock options	792			792
Equity-based compensation related to deferred stock units (DSUs)	526			526
Equity-based compensation related to restricted stock (RS)	21,818			21,818
Issuance of DSUs	258			258
Issuance of DSUs (in shares)		41,000
Issuance of RS, net of forfeitures primarily related to satisfying tax withholdings	(1,822)	$ 3		(1,825)
Issuance of RS, net of forfeitures primarily related to satisfying tax withholdings (in shares)		2,777,000
Exercise of SARs and stock options, net of forfeitures related to satisfying tax withholdings	(3,207)			(3,207)
Exercise of SARs and stock options, net of forfeitures related to satisfying tax withholdings (in shares)		254,000
Impact of redeemable noncontrolling interest accretion	(4,244)			(4,244)
Impact of subsidiary equity transactions	1,658			2,551			(893)
Repurchase of common stock	(12,809)		$ (12,809)
Repurchase of common stock (in shares)			(774,000)
Net income (loss)	(27,892)				(23,556)		(4,336)
Ending balance at Dec. 31, 2014	448,756	$ 46	$ (53,807)	3,553,430	(3,069,241)	40	18,288
Ending balance (in shares) at Dec. 31, 2014		46,405,000	(5,892,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation expense related to stock appreciation rights (SARs) and stock options	398			398
Equity-based compensation related to deferred stock units (DSUs)	234			234
Equity-based compensation related to restricted stock (RS)	23,120			23,120
Issuance of DSUs	82			82
Issuance of DSUs (in shares)		94,000
Issuance of RS, net of forfeitures primarily related to satisfying tax withholdings	(4,170)	$ 1		(4,171)
Issuance of RS, net of forfeitures primarily related to satisfying tax withholdings (in shares)		253,000
Exercise of SARs and stock options, net of forfeitures related to satisfying tax withholdings	(100)			(100)
Exercise of SARs and stock options, net of forfeitures related to satisfying tax withholdings (in shares)		11,000
Impact of redeemable noncontrolling interest accretion	(4,704)			(4,704)
Impact of subsidiary equity transactions	(4,803)			(4,441)			(362)
Repurchase of common stock	$ (1,702)		$ (1,702)
Repurchase of common stock (in shares)	(96,277)		(96,000)
Net income (loss)	$ (99,140)				(96,080)		(3,060)
Ending balance at Dec. 31, 2015	357,971	$ 47	$ (55,509)	3,563,848	(3,165,321)	40	14,866
Ending balance (in shares) at Dec. 31, 2015		46,763,000	(5,988,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation expense related to stock appreciation rights (SARs) and stock options	128			128
Equity-based compensation related to deferred stock units (DSUs)	341			341
Equity-based compensation related to restricted stock (RS)	11,390			11,390
Issuance of RS, net of forfeitures primarily related to satisfying tax withholdings	(1,574)	$ 0		(1,574)
Issuance of RS, net of forfeitures primarily related to satisfying tax withholdings (in shares)		(267,000)
Exercise of SARs and stock options, net of forfeitures related to satisfying tax withholdings	(254)			(254)
Exercise of SARs and stock options, net of forfeitures related to satisfying tax withholdings (in shares)		27,000
Impact of redeemable noncontrolling interest accretion	(599)			(599)
Impact of subsidiary equity transactions	5,719			4,924		59	736
Repurchase of common stock	$ (74,265)		$ (74,265)
Repurchase of common stock (in shares)	(5,598,094)		(5,598,000)
Net income (loss)	$ 66,627			0	70,085		(3,458)
Ending balance at Dec. 31, 2016	$ 365,484	$ 47	$ (129,774)	$ 3,578,204	$ (3,095,236)	$ 99	$ 12,144
Ending balance (in shares) at Dec. 31, 2016		46,523,000	(11,586,000)