Accrued Expenses and Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued Expenses and Other Liabilities
Salaries and wages, Accrued Expenses	$ 86,776	$ 121,087
Salaries and wages, Non-Current Liabilities	0	0
Salaries and wages, Total	86,776	121,087
Deferred compensation, Accrued Expenses	1,630	1,405
Deferred compensation, Non-Current Liabilities	24,918	21,285
Deferred compensation, Total	26,548	22,690
Pension benefits, Accrued Expenses	3,309	3,120
Pension benefits, Non-Current Liabilities	597,275	546,681
Pension benefits, Total	600,584	549,801
Other postretirement benefits, Accrued Expenses	2,683	2,838
Other postretirement benefits, Non-Current Liabilities	37,916	40,154
Other postretirement benefits, Total	40,599	42,992
Insurance obligations, primarily self-insurance, Accrued Expenses	133,459	120,045
Insurance obligations, primarily self-insurance, Non-Current Liabilities	178,714	157,390
Insurance obligations, primarily self-insurance, Total	312,173	277,435
Residual value guarantees, Accrued Expenses	1,505	3,093
Residual value guarantees, Non-Current Liabilities	130	1,125
Residual value guarantees, Total	1,635	4,218
Deferred rent, Accrued Expenses	9,244	4,088
Deferred rent, Non-Current Liabilities	9,405	14,686
Deferred rent, Total	18,649	18,774
Environmental liabilities, Accrued Expenses	4,201	4,368
Environmental liabilities, Non-Current Liabilities	8,415	9,171
Environmental liabilities, Total	12,616	13,539
Asset retirement obligations, Accrued Expenses	3,642	5,702
Asset retirement obligations, Non-Current Liabilities	17,116	12,364
Asset retirement obligations, Total	20,758	18,066
Operating taxes, Accrued Expenses	91,419	81,820
Operating taxes, Non-Current Liabilities	0	0
Operating taxes, Total	91,419	81,820
Income taxes, Accrued Expenses	8,288	4,160
Income taxes, Non-Current Liabilities	57,590	74,147
Income taxes, Total	65,878	78,307
Interest, Accrued Expenses	35,798	30,410
Interest, Non-Current Liabilities	0	0
Interest, Total	35,798	30,410
Deposits, mainly from customers, Accrued Expenses	51,671	50,951
Deposits, mainly from customers, Non-Current Liabilities	6,236	7,544
Deposits, mainly from customers, Total	57,907	58,495
Deferred revenue, Accrued Expenses	21,557	20,698
Deferred revenue, Non-Current Liabilities	0	476
Deferred revenue, Total	21,557	21,174
Acquisition holdbacks, Accrued Expenses	1,637	7,422
Acquisition holdbacks, Non-Current Liabilities	2,673	0
Acquisition holdbacks, Total	4,310	7,422
Other, Accrued Expenses	48,888	46,423
Other, Non-Current Liabilities	8,544	11,564
Other, Total	57,432	57,987
Total Accrued Expenses	505,707	507,630
Total, Non-Current Liabilities	948,932	896,587
Total	$ 1,454,639	$ 1,404,217