Unaudited Condensed Consolidated Statements of Comprehensive Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 5,147	$ 21,712	$ 9,569	$ 46,962
Foreign currency translation adjustment	(495)	(16,696)	228	(5,875)
Current period cash flow hedging activity, net of $356 and $432 tax expense in the three and six months ended June 30, 2013, respectively, and $541 and $16 tax expense in the three and six months ended June 30, 2012, respectively	577	2,810	697	2,274
Reclassification of hedging activities into earnings, net of $77 and $170 tax benefit in the three and six months ended June 30, 2013, respectively, and $1,071 and $2,293 tax expense in the three and six months ended June 30, 2012, respectively	124	(368)	273	(222)
Reclassification of pension and postretirement adjustments into earnings, net of $264 and $408 tax benefit in the three and six months ended June 30, 2013, respectively, and $542 and $1,114 tax benefit in the three and six months ended June 30, 2012, respectively	363	1,904	805	3,897
Comprehensive income	$ 5,716	$ 9,362	$ 11,572	$ 47,036