Commitments and Contingencies Schedule of Future Lease Payments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Operating Leased Assets [Line Items]
2014	2,250
2013	3,240
2015	1,729
2016	1,532
2017	1,064
Thereafter	3,931
Future Minimum Payments	13,746
Minimum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	1 year
Maximum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	10 years