Consolidated Statements of Shareholders' Equity Statement (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2010	$ 48,843	$ 239	$ 566,328	$ (521,408)	$ 3,684
Beginning balance, shares at Dec. 31, 2010		23,932,774
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	2,816			2,816
Foreign currency translation adjustments	(519)				(519)
Issuances of Common Stock [Abstract]
Restricted share awards, shares		694,030
Restricted share awards	0	7	(7)
Shares issued for acquisition, shares		640,614
Shares issued for acquisition	3,722	6	3,716
Restricted shares remitted by employees for taxes, shares		(132,974)
Restricted shares remitted by employees for taxes	(1,063)	(1)	(1,062)
Stock option exercises, shares		116,073
Stock option exercises	353	1	352
2006 MIP Performance Unit settlements, shares		26,898
2006 MIP Performance Unit settlements	0	0	0
Forfeited restricted share awards, shares		(168,661)
Forfeited restricted share awards	0	(1)	1
Stock-based compensation expense	4,938		4,938
Ending balance at Dec. 31, 2011	59,090	251	574,266	(518,592)	3,165
Ending balance, shares at Dec. 31, 2011		25,108,754
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	5,392			5,392
Foreign currency translation adjustments	363				363
Issuances of Common Stock [Abstract]
Restricted share awards, shares		500,128
Restricted share awards	0	5	(5)
Shares issued for stock offering, shares		2,500,000
Shares issued for stock offering	14,682	25	14,657
Restricted shares remitted by employees for taxes, shares		(161,514)
Restricted shares remitted by employees for taxes	(1,605)	(2)	(1,603)
Stock option exercises, shares		141,849
Stock option exercises	559	2	557
Forfeited restricted share awards, shares		(196,085)
Forfeited restricted share awards	0	(2)	2
Stock-based compensation expense	6,171		6,171
Ending balance at Dec. 31, 2012	84,652	279	594,045	(513,200)	3,528
Ending balance, shares at Dec. 31, 2012	27,893,132	27,893,132
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(186)			(186)
Foreign currency translation adjustments	(1,414)				(1,414)
Issuances of Common Stock [Abstract]
Restricted share awards, shares		665,629
Restricted share awards	0	7	(7)
Shares issued for acquisition, shares		904,540
Shares issued for acquisition	1,472	2	1,470
Shares issued for stock offering, shares		0
Shares issued for stock offering	4,118	7	4,111
Restricted shares remitted by employees for taxes, shares		(259,116)
Restricted shares remitted by employees for taxes	(1,757)	(3)	(1,754)
Stock option exercises, shares		202,159
Stock option exercises	916	2	914
2006 MIP Performance Unit settlements, shares		52,912
2006 MIP Performance Unit settlements	0	1	(1)
Forfeited restricted share awards, shares		(91,817)
Forfeited restricted share awards	0	(1)	1
Stock-based compensation expense	6,027		6,027
Ending balance at Dec. 31, 2013	$ 93,828	$ 294	$ 604,806	$ (513,386)	$ 2,114
Ending balance, shares at Dec. 31, 2013	29,367,439	29,367,439