Commitments and Contingencies (Schedule of Lease Commitments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
2013	$ 66,554
2014	58,549
2015	47,065
2016	37,859
2017	19,063
Thereafter	32,305
Total operating leases	261,395
Sublease income, 2012	193
Sublease income, 2013	0
Sublease income, 2014	0
Sublease income, 2015	0
Sublease income, 2016	0
Sublease income, thereafter	0
Sublease income, total	$ 193

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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