Changes in Operations (Details 4)	3 Months Ended		9 Months Ended		1 Months Ended		9 Months Ended
	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2010 HCRY [Member] USD ($)	Jun. 30, 2009 HCRY [Member] USD ($)	Sep. 30, 2011 HCRY [Member] USD ($)	Sep. 30, 2011 HCRY [Member] CAD
Restructuring Cost and Reserve [Line Items]
HCRY impairment and restructuring charges, net of tax						$ 5,400,000
HCRY loss on write-down						6,700,000
Restructuring charges	0	(2,349,000)	0	(2,349,000)		2,300,000
HCRY income tax benefit	12,287,000	12,109,000	32,192,000	33,817,000		(3,600,000)
Amounts pledged by the governments							28,600,000	30,000,000
Reversal of accrued restructuring charges					2,300,000
Reversal of accrued restructuring charges after tax					$ 1,500,000