Quarterly Consolidated Financial Data (unaudited) (Details) (USD $) In Thousands, except Per Share data, 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
Quarterly Consolidated Financial Data (unaudited) [Abstract]
Revenues	$ 44,485	$ 44,044	$ 46,059	$ 41,650	$ 54,299	$ 62,152	$ 56,326	$ 45,709	$ 176,238	$ 218,486	$ 187,196
Gross Profit	22,873	22,470	23,515	21,874	28,563	33,125	30,222	23,765	90,732	115,675	100,353
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	419	37	1,332	(255)	6,032	10,571	9,931	2,873	1,533	29,407	20,394
Net Income (Loss) Attributable to Parent	$ 2,054	$ 252	$ 759	$ 393	$ 28,996	$ 6,661	$ 6,346	$ 1,862	$ 3,458	$ 43,865	$ 25,226
Earnings Per Share, Basic	$ 0.06	$ 0.01	$ 0.02	$ 0.01	$ 0	$ 0	$ 0	$ 0	$ 0.11	$ 1.36	$ 0.79
Earnings Per Share, Diluted	$ 0.06	$ 0.01	$ 0.02	$ 0.01	$ 0	$ 0	$ 0	$ 0	$ 0.10	$ 1.34	$ 0.78
Weighted Average Number of Shares Outstanding, Basic	32,951	32,897	32,567	32,523	32,354	32,317	32,144	32,026	32,783	32,226	31,744
Weighted Average Number of Shares Outstanding, Diluted	33,539	33,426	33,155	33,239	33,045	32,862	32,727	32,713	33,388	32,853	32,256