Commitments and Contingencies (Leases) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013	$ 8,512,000
2014	7,604,000
2015	7,678,000
2016	7,068,000
2017	4,310,000
Thereafter	10,170,000
Operating Leases, Future Minimum Payments Due	45,342,000
Operating Leases, Rent Expense, Net [Abstract]
Operating Leases, Rent Expense, Net	$ 23,200,000	$ 21,900,000	$ 21,900,000