Accumulated Other Comprehensive Income (Loss) Changes in Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance January 1,	$ (166,814)	$ (150,364)
Other comprehensive (loss) income before reclassifications	(5,387)	1,983
Amounts reclassified from accumulated other comprehensive income (net of tax)	16,716	13,462
Actuarial gain (loss) (net of tax)	15,122	(31,895)
Net current-period other comprehensive (loss) income	26,451	(16,450)
Ending Balance December 31,	(140,363)	(166,814)
Foreign Currency
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance January 1,	12,040	10,057
Other comprehensive (loss) income before reclassifications	(5,387)	1,983
Amounts reclassified from accumulated other comprehensive income (net of tax)	0	0
Actuarial gain (loss) (net of tax)	0	0
Net current-period other comprehensive (loss) income	(5,387)	1,983
Ending Balance December 31,	6,653	12,040
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance January 1,	(178,854)	(160,421)
Other comprehensive (loss) income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (net of tax)	16,716	13,462
Actuarial gain (loss) (net of tax)	15,122	(31,895)
Net current-period other comprehensive (loss) income	31,838	(18,433)
Ending Balance December 31,	$ (147,016)	$ (178,854)