Restructuring Charges (Details) (USD $)	3 Months Ended	6 Months Ended	8 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013
Restructuring Charges
Total estimated non-cash restructuring charges		$ 1,000,000
Changes in restructuring liabilities, recorded in other accrued expenses
Restructuring liability at the beginning of period		5,088,000
Restructuring charges	604,000	953,000
Non-cash items		(117,000)
Cash paid		(4,681,000)
Foreign exchange rate changes		(80,000)
Restructuring liability at the end of period	1,163,000	1,163,000	1,163,000
Total Anticipated Charges		12,500,000
Restructuring charges, incurred to date			8,934,000
North America
Changes in restructuring liabilities, recorded in other accrued expenses
Restructuring charges	39,000	(104,000)
Total Anticipated Charges		1,796,000
Restructuring charges, incurred to date			1,360,000
International
Changes in restructuring liabilities, recorded in other accrued expenses
Restructuring charges	504,000	930,000
Total Anticipated Charges		7,157,000
Restructuring charges, incurred to date			6,704,000
Corporate
Changes in restructuring liabilities, recorded in other accrued expenses
Restructuring charges	61,000	127,000
Total Anticipated Charges		3,547,000
Restructuring charges, incurred to date			870,000
Employee Severance and Termination
Changes in restructuring liabilities, recorded in other accrued expenses
Restructuring liability at the beginning of period		3,556,000
Restructuring charges		411,000
Cash paid		(3,707,000)
Foreign exchange rate changes		(80,000)
Restructuring liability at the end of period	180,000	180,000	180,000
Total Anticipated Charges		7,000,000
Office Closures
Restructuring Charges
Number of offices closed	17	17	17
Changes in restructuring liabilities, recorded in other accrued expenses
Restructuring liability at the beginning of period		1,532,000
Restructuring charges		542,000
Non-cash items		(117,000)
Cash paid		(974,000)
Restructuring liability at the end of period	983,000	983,000	983,000
Total Anticipated Charges		6,000,000
Restructuring charges, incurred to date			$ 2,000,000