Other Comprehensive Income - (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax			$ (12,440,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax			390,000
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax			0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax			390,000
Ending Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(12,050,000)		(12,050,000)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax			(1,680,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax			4,380,000
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax			370,000
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	4,070,000	(510,000)	4,750,000	(920,000)
Ending Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	3,070,000		3,070,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax			53,380,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax			(10,610,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax			0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(8,470,000)	(4,870,000)	(10,610,000)	(360,000)
Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	42,770,000		42,770,000
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax			39,260,000
Other Comprehensive Income (Loss), Net Unrealized Gains (Losses) Arising During the Period, Net of Tax			(5,840,000)
Other Comprehensive income, Net Realized Gains (Losses) to Net Income			370,000
Total other comprehensive income (loss)	(4,210,000)	(5,290,000)	(5,470,000)	(1,070,000)
Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax	33,790,000		33,790,000
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax			$ 200,000