Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in AOCI by component
Beginning balance, net of tax	$ (25,509)
Other comprehensive income before reclassifications	28,038
Less income reclassified from AOCI	2,527
Net other comprehensive income	25,511
Income tax (expense) benefit	(1,615)	496	607
Ending balance, net of tax	(1,613)	(25,509)
Foreign currency translation adjustment
Changes in AOCI by component
Beginning balance, net of tax	36,830
Other comprehensive income before reclassifications	1,745
Net other comprehensive income	1,745
Income tax (expense) benefit	(106)
Ending balance, net of tax	38,469
Retirement plan related adjustment
Changes in AOCI by component
Beginning balance, net of tax	(62,375)
Other comprehensive income before reclassifications	26,222
Less income reclassified from AOCI	2,533
Net other comprehensive income	23,689
Income tax (expense) benefit	(1,527)
Ending balance, net of tax	(40,213)
Unrealized gain (loss) on cash flow hedges
Changes in AOCI by component
Beginning balance, net of tax	36
Other comprehensive income before reclassifications	71
Less income reclassified from AOCI	(6)
Net other comprehensive income	77
Income tax (expense) benefit	18
Ending balance, net of tax	$ 131