Accrued Expenses and Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Accrued Expenses and Other Liabilities
Salaries and wages, Accrued Expenses	$ 99,146		$ 106,281
Salaries and wages, Non-Current Liabilities	0		0
Salaries and wages, Total	99,146		106,281
Deferred compensation, Accrued Expenses	3,033		2,505
Deferred compensation, Non-Current Liabilities	34,876		31,896
Deferred compensation, Total	37,909		34,401
Other employee benefits, Accrued Expenses	6,075		3,809
Other employee benefits, Non-Current Liabilities	6,547		6,712
Other employee benefits, Total	12,622		10,521
Pension benefits, Accrued Expenses	3,570		3,660
Pension benefits, Non-Current Liabilities	240,050		292,155
Pension benefits, Total	243,620		295,815
Other postretirement benefits, Accrued Expenses	2,402		2,414
Other postretirement benefits, Non-Current Liabilities	27,028		28,374
Other postretirement benefits, Total	29,430		30,788
Insurance obligations, Accrued Expenses	132,283	[1]	125,835	[1]
Insurance obligations, Non-Current Liabilities	191,985	[1]	186,700	[1]
Insurance obligations, Total	324,268	[1]	312,535	[1]
Accrued rent, Accrued Expenses	8,474		4,373
Accrued rent, Non-Current Liabilities	1,967		3,372
Accrued rent, Total	10,441		7,745
Environmental liabilities, Accrued Expenses	3,924		4,515
Environmental liabilities, Non-Current Liabilities	8,578		8,548
Environmental liabilities, Total	12,502		13,063
Asset retirement obligations, Accrued Expenses	5,521		6,144
Asset retirement obligations, Non-Current Liabilities	19,236		19,403
Asset retirement obligations, Total	24,757		25,547
Operating taxes, Accrued Expenses	93,805		94,188
Operating taxes, Non-Current Liabilities	0		0
Operating taxes, Total	93,805		94,188
Income taxes, Accrued Expenses	3,168		2,623
Income taxes, Non-Current Liabilities	25,236		23,813
Income taxes, Total	28,404		26,436
Interest, Accrued Expenses	27,904		33,654
Interest, Non-Current Liabilities	0		0
Interest, Total	27,904		33,654
Deposits, mainly from customers, Accrued Expenses	57,880		55,854
Deposits, mainly from customers, Non-Current Liabilities	5,993		6,239
Deposits, mainly from customers, Total	63,873		62,093
Deferred revenue, Accrued Expenses	12,908		15,123
Deferred revenue, Non-Current Liabilities	0		0
Deferred Revenue, Total	12,908		15,123
Acquisition Holdbacks, Accrued Expenses	3,972		2,012
Acquisition Holdbacks, Noncurrent Liabilities	2,272		0
Acquisition Holdbacks, Total	6,244		2,012
Other, Accrued Expenses	35,427		33,347
Other, Non-Current Liabilities	11,275		9,093
Other, Total	46,702		42,440
Total, Accrued Expenses	499,492		496,337
Total, Non-Current Liabilities	575,043		616,305
Total	$ 1,074,535		$ 1,112,642

[1] Insurance obligations are primarily comprised of self-insured claim liabilities.