Commitments and Contingencies - Operating 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]
Operating Leases, Rent Expense	$ 5,510	$ 5,189	$ 5,282
Future Operating Lease Minimum Payments, Due Next Year	4,991
Future Operating Lease Minimum Payments, Due in Two Years	4,154
Future Operating Lease Minimum Payments, Due in Three Years	3,507
Future Operating Lease Minimum Payments, Due in Four Years	1,812
Future Operating Lease Minimum Payments, Due in Five Years	5
Future Operating Lease Minimum Payments, Due Therafter	$ 0