Restructuring and Other Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (recoveries), net	$ 7,142	$ 0	$ 8,007	$ 768
Restructuring reserves
Restructuring Reserves, Beginning Balance			5,246
Additions			8,007
Cash Payments			1,819
Restructuring Reserve, Accrual Adjustment			555
Foreign Translation Adjustments			53
Restructuring Reserves, Ending Balance	10,932		10,932
Hill Hire [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (recoveries), net			865
Employee severance and benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (recoveries), net	7,142	0	7,142	393
Restructuring reserves
Restructuring Reserves, Beginning Balance			2,607
Additions			7,142
Cash Payments			1,160
Restructuring Reserve, Accrual Adjustment			0
Foreign Translation Adjustments			7
Restructuring Reserves, Ending Balance	8,596		8,596
Contract termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (recoveries), net	0	0	865	375
Restructuring reserves
Restructuring Reserves, Beginning Balance			2,639
Additions			865
Cash Payments			659
Restructuring Reserve, Accrual Adjustment			555
Foreign Translation Adjustments			46
Restructuring Reserves, Ending Balance	$ 2,336		$ 2,336