Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 3,419	$ 3,530	$ 3,746
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1:	3,530	3,746	3,843
Additions based on tax positions related to current year	516	600	593
Additions based on tax positions of prior years	0	0	0
Reductions for tax positions of prior years	(567)	(570)	(579)
Settlements	(60)	(246)	(111)
Balance at December 31:	3,419	3,530	3,746
Accrued interest and penalties	1,220	1,195
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory federal tax rate	35.00%	35.00%	35.00%
State and local income taxes, net of federal benefit	3.60%	3.90%	3.60%
Other, net	1.20%	1.60%	(0.10%)
Effective tax rate	39.80%	40.50%	38.50%
Income before Income Taxes, Domestic	127,858	133,300	121,770
Income before Income Taxes, Foreign	7,093	12,148	11,419
Income before provision for income taxes	134,951	145,448	133,189
Provisions for Income Taxes Recorded in the Consolidated Statements of Income [Abstract]
U.S. Federal, current expense	47,790	38,642	41,052
State, current expense	7,066	6,848	6,343
Foreign, current expense	2,217	3,366	3,579
Total current expense	57,073	48,856	50,974
U.S. Federal, deferred expense	(2,983)	9,090	246
State, deferred expense	(458)	786	178
Foreign, deferred expense	45	118	(100)
Total deferred (benefit) expense	(3,396)	9,994	324
Total income tax provision	53,677	58,850	51,298
Components of Deferred Tax Assets and Liabilities [Abstract]
Postretirement benefits	29,260	32,257
Payroll accruals	3,114	3,095
Bad debt reserves	2,094	2,178
Other deferred tax assets	9,820	10,359
Pension	41,682	55,665
Inventory	4,597	3,174
Subtotal	90,567	106,728
less: valuation allowances	(279)	(285)
Deferred tax assets	90,288	106,443
Fixed assets	(33,988)	(32,999)
Computer software	(3,775)	(3,708)
Other deferred tax liabilities	(1,868)	(2,184)
Deferred tax liabilities	(39,631)	(38,891)
Net deferred tax assets	50,657	67,552
Deferred tax assets, included in other current assets	5,936	3,678
Deferred tax assets, included in other non-current assets	45,135	64,260
Deferred tax liabilities, net, current	414	386
Deferred tax assets, operating loss carryforwards, foreign	232	285
Deferred tax assets, state net operting loss carryforwards	1,165	1,821
Deferred tax assets, valuation allowance	279	285
Undistributed earnings of non-U.S. subsidiaries	$ 59,388	$ 54,440