Accrued Expenses and Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Expenses and Other Liabilities
Salaries and wages, Accrued Expenses	$ 106,281	$ 86,776
Salaries and wages, Non-Current Liabilities	0	0
Salaries and wages, Total	106,281	86,776
Deferred compensation, Accrued Expenses	2,505	1,630
Deferred compensation, Non-Current Liabilities	31,896	24,918
Deferred compensation, Total	34,401	26,548
Pension benefits, Accrued Expenses	3,660	3,309
Pension benefits, Non-Current Liabilities	292,155	597,275
Pension benefits, Total	295,815	600,584
Other postretirement benefits, Accrued Expenses	2,414	2,683
Other postretirement benefits, Non-Current Liabilities	28,374	37,916
Other postretirement benefits, Total	30,788	40,599
Insurance obligations, primarily self-insurance, Accrued Expenses	125,835	133,459
Insurance obligations, primarily self-insurance, Non-Current Liabilities	186,700	178,714
Insurance obligations, primarily self-insurance, Total	312,535	312,173
Residual value guarantees, Accrued Expenses	0	1,505
Residual value guarantees, Non-Current Liabilities	239	130
Residual value guarantees, Total	239	1,635
Deferred rent, Accrued Expenses	4,373	9,244
Deferred rent, Non-Current Liabilities	3,372	9,405
Deferred rent, Total	7,745	18,649
Environmental liabilities, Accrued Expenses	4,515	4,201
Environmental liabilities, Non-Current Liabilities	8,548	8,415
Environmental liabilities, Total	13,063	12,616
Asset retirement obligations, Accrued Expenses	6,144	3,642
Asset retirement obligations, Non-Current Liabilities	19,403	17,116
Asset retirement obligations, Total	25,547	20,758
Operating taxes, Accrued Expenses	94,188	91,419
Operating taxes, Non-Current Liabilities	0	0
Operating taxes, Total	94,188	91,419
Income taxes, Accrued Expenses	2,623	8,288
Income taxes, Non-Current Liabilities	62,569	57,590
Income taxes, Total	65,192	65,878
Interest, Accrued Expenses	33,654	35,798
Interest, Non-Current Liabilities	0	0
Interest, Total	33,654	35,798
Deposits, mainly from customers, Accrued Expenses	55,854	51,671
Deposits, mainly from customers, Non-Current Liabilities	6,239	6,236
Deposits, mainly from customers, Total	62,093	57,907
Deferred revenue, Accrued Expenses	15,123	21,557
Deferred revenue, Non-Current Liabilities	0	0
Deferred revenue, Total	15,123	21,557
Acquisition holdbacks, Accrued Expenses	2,012	1,637
Acquisition holdbacks, Non-Current Liabilities	0	2,673
Acquisition holdbacks, Total	2,012	4,310
Other, Accrued Expenses	37,156	48,888
Other, Non-Current Liabilities	15,566	8,544
Other, Total	52,722	57,432
Total Accrued Expenses	496,337	505,707
Total, Non-Current Liabilities	655,061	948,932
Total	$ 1,151,398	$ 1,454,639