Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
BALANCE - value at Dec. 31, 2012	$ 273,425	$ 6		$ 271,418	$ 2,591	$ (380)	$ (210)
BALANCE - shares at Dec. 31, 2012		59,359
Share-based compensation, Value	3,251			3,251
Share-based compensation, Shares		96
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(308)			(308)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		75
Exercise of stock options and purchases from employee stock plans, Value	668			668
Exercise of stock options and purchases from employee stock plans, Shares		140
Excess income tax benefit from share-based compensation	154			154
Purchase of noncontrolling interests	(3)						(3)
Net loss	(34,993)				(34,361)		(632)
Other comprehensive loss—net of tax	(93)					(93)
BALANCE - value at Dec. 31, 2013	242,101	$ 6		275,183	(31,770)	(473)	(845)
BALANCE - shares at Dec. 31, 2013		59,670
Share-based compensation, Value	2,694			2,694
Share-based compensation, Shares		118
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(497)			(497)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		111
Exercise of stock options and purchases from employee stock plans, Value	1,568			1,568
Exercise of stock options and purchases from employee stock plans, Shares		271
Excess income tax benefit from share-based compensation	206			206
Purchase of noncontrolling interests	(143)			(988)			$ 845
Net loss	10,295				10,295
Other comprehensive loss—net of tax	(261)					(261)
BALANCE - value at Dec. 31, 2014	255,963	$ 6		278,166	(21,475)	(734)
BALANCE - shares at Dec. 31, 2014		60,170
Share-based compensation, Value	4,040			4,040
Share-based compensation, Shares		154
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(267)			(267)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		115
Exercise of stock options and purchases from employee stock plans, Value	$ 1,365			1,365
Exercise of stock options and purchases from employee stock plans, Shares	86	270
Excess income tax benefit from share-based compensation	$ (57)			(57)
Purchase of treasury stock, value	(1,433)		$ (1,433)
Purchase of treasury stock, shares			(278)
Net loss	(6,189)				(6,189)
Other comprehensive loss—net of tax	(1,249)					(1,249)
BALANCE - value at Dec. 31, 2015	$ 252,173	$ 6	$ (1,433)	$ 283,247	$ (27,664)	$ (1,983)
BALANCE - shares at Dec. 31, 2015		60,709	(278)