Commitments and Contingencies (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, Net	$ 58,188	$ 59,873	$ 62,099
Future minimum lease payments [Abstract]
2014	42,282
2015	35,231
2016	28,112
2017	19,546
2018	11,355
Thereafter	$ 13,532