Income Taxes - Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Carryforwards
Tax settlement	$ 20,000,000
Undistributed earnings on a book basis for the non-U.S. subsidiaries		2,000,000
Total unrecognized tax benefits		9,365,000	1,834,000	1,366,000	2,003,000
Unrecognized tax benefits, interest on income taxes accrued		584,000
Unrecognized tax benefits, increase in interest on income taxes accrued		365,000
Unrecognized tax benefits, income tax penalties accrued		80,000
Unrecognized tax benefits, increase in income tax penalties accrued		10,000
Unrecognized tax benefits affecting the company's effective income tax rate	8,000,000
Unrecognized tax benefits to be recorded in discontinued operations	1,400,000
Capital Loss Carryforward
Carryforwards
Capital loss, valuation allowance		1,800,000
Capital loss carryforwards		4,500,000
Foreign Tax Authority
Carryforwards
Operating loss carryforwards, valuation allowance		1,100,000
Operating loss carryforwards		8,300,000
Deferred tax assets associated with net operating loss carryforwards, recognized		800,000
Net operating loss carryforward deferred tax assets more than likely not be realized in future periods		$ 800,000