SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF THE REGISTRANT [Schedule] Condensed Statement of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating expenses:
Depreciation and amortization									$ 6,406	$ 6,438	$ 6,251
Business reorganization expenses									6,721	7,782	720
Operating income (loss)	(7,653)	(5,140)	(5,424)	(8,542)	1,831	(1,600)	(3,167)	(3,702)	(26,759)	(6,638)	17,435
Other income (expense):
Interest income (expense), net									(596)	(635)	(1,143)
Other income (expense), net									753	254	(44)
Income (loss) from continuing operations before provision for income taxes									(26,602)	(7,019)	16,248
Provision for (benefit from) income taxes									3,793	(1,684)	5,339
Net income (loss)	(11,296)	(5,047)	(5,811)	(8,241)	(343)	(2,165)	394	(3,221)	(30,395)	(5,335)	10,909
Parent Company
Operating expenses:
Selling, general and administrative expenses									15,953	18,272	19,860
Depreciation and amortization									645	641	595
Business reorganization expenses									790	359	0
Operating income (loss)									(17,388)	(19,272)	(20,455)
Other income (expense):
Interest income (expense), net									105	43	28
Other income (expense), net									9,412	15,016	17,770
Equity in earnings (losses) of subsidiaries, net of income taxes									(22,522)	(1,103)	13,557
Income (loss) from continuing operations before provision for income taxes									(30,393)	(5,316)	10,900
Provision for (benefit from) income taxes									2	19	(9)
Net income (loss)									$ (30,395)	$ (5,335)	$ 10,909