Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies [Abstract]
Number of minority operating lease	1
Rent expense	$ 908	$ 458	$ 438
Annual minimum payments under operating lease [Abstract]
2013	720
2014	213
2015	177
Thereafter	55
Total	1,165
Amount of aggregate commitment under the executive severance agreements should all covered executives and employees be terminated other than for cause	2,550
Amount of commitment should all covered executives and certain key employees be terminated following a change in control of the Company	$ 2,299