Consolidated Statements of Shareholders' Deficit and Comprehensive Income (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2012	$ (2,024)	$ 915	$ 740,171	$ (744,213)	$ 3,301	$ (2,198)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation recognized under stock compensation plans	471		471
Contributions from noncontrolling interests	159					159
Distributions to noncontrolling interests	(776)					(776)
Acquisition of noncontrolling interests	(612)		2,944			(2,332)
Other changes in noncontrolling interests	(502)					(502)
Adjustment to estimated accrued offering costs	1,770		1,770
Net income (loss)	(67,512)			(67,529)		17
Other comprehensive loss	(198)				(198)
Balance at Dec. 31, 2013	(68,220)	915	739,468	(811,742)	3,103	36
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation recognized under stock compensation plans	637		637
Distributions to noncontrolling interests	(5)					(5)
Exchange of membership interest for forgiveness of note payable	3,921		3,814			107
Other changes in noncontrolling interests	(138)					(138)
Adjustment to estimated accrued offering costs	0
Net income (loss)	30,939			30,939		0
Other comprehensive loss	(484)				(484)
Balance at Dec. 31, 2014	$ (33,350)	$ 915	$ 743,919	$ (780,803)	$ 2,619	$ 0