Earnings (Loss) Per Share (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
Earnings (Loss) Per Share [Abstract]
Options Excluded from calculation									707	984	1,257
Restricted Stock Units Excluded from Calculation									3	37	291
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
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 Diluted Shares Outstanding Adjustment									605	627	512
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
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