Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated other comprehensive loss, tax
Accumulated other comprehensive loss at the beginning of the period	$ 19,392
Amounts reclassified from accumulated other comprehensive loss	54
Current-period other comprehensive income (loss) activity	(692)
Accumulated other comprehensive loss at the end of the period	18,754
Accumulated other comprehensive loss, net of tax
Accumulated other comprehensive loss at the beginning of the period	(29,688)
Amounts reclassified from accumulated other comprehensive loss	(83)	(166)
Current-period other comprehensive income (loss) activity	1,470
Accumulated other comprehensive loss at the end of the period	(28,301)
Cumulative Translation Adjustment
Accumulated other comprehensive loss, before tax
Accumulated other comprehensive loss at the beginning of the period	338
Current-period other comprehensive income (loss) activity	2,167
Accumulated other comprehensive loss at the end of the period	2,505
Cash Flow Hedges
Accumulated other comprehensive loss, before tax
Accumulated other comprehensive loss at the beginning of the period	(828)
Amounts reclassified from accumulated other comprehensive loss	65
Current-period other comprehensive income (loss) activity	(5)
Accumulated other comprehensive loss at the end of the period	(768)
Defined Benefit Plans
Accumulated other comprehensive loss, before tax
Accumulated other comprehensive loss at the beginning of the period	(48,590)
Amounts reclassified from accumulated other comprehensive loss	(202)
Accumulated other comprehensive loss at the end of the period	$ (48,792)