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Commitments and Contingencies - Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Rental expense for period	$ 2,123	$ 1,947	$ 1,982
2013	2,267
2014	2,191
2015	1,639
2016	1,240
2017	1,227
Thereafter	3,138
Total future minimum lease payments	$ 11,702

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