Income Taxes Deferred Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Gross deferred tax assets:
Liabilities for dispositions and discontinued operations	$ 29,944	$ 33,295
Pension, postretirement and other employee benefits	66,354	62,382
Foreign and state NOL carryforwards	18,023	17,796
Tax credit carryforwards	4,429	4,443
Other	8,736	13,615
Total gross deferred tax assets	127,486	131,531
Less: Valuation allowance	(19,294)	(18,811)
Total deferred tax assets after valuation allowance	108,192	112,720
Gross deferred tax liabilities:
Accelerated depreciation	(61,414)	(62,594)
Repatriation of foreign earnings	(5,428)	(5,030)
Other	(4,461)	(4,021)
Deferred Tax Liabilities, Gross	(71,303)	(71,645)
Net deferred tax asset	36,889	41,075
Net deferred tax asset (liability):
Current portion of deferred tax asset	15,845	17,133
Noncurrent portion of deferred tax asset	26,792	30,211
Noncurrent portion of deferred tax liability	(5,748)	(6,269)
Net deferred tax asset	$ 36,889	$ 41,075