Accumulated Other Comprehensive Income (Loss) (Details) (USD $)			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Distribution Segment Canadian Operations [Member]
Changes in pension and post-retirement benefit plans	$ (104,551,000)	$ (96,111,000)
Foreign currency translation adjustment	(16,515,000)	(21,365,000)
Unrealized gain (loss) on derivative instruments	(524,000)	(470,000)
Accumulated other comprehensive income (loss)	(121,590,000)	(117,946,000)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax			$ 300,000