Operating Leases (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Leases, Operating [Abstract]
Expense for operating leases	$ 25,400,000	$ 29,700,000	$ 28,200,000
Future minimum operating lease payments
2014	22,184,000
2015	15,729,000
2016	12,087,000
2017	8,113,000
2018	6,510,000
Thereafter	3,575,000
Total future minimum operating lease payments	$ 68,198,000