Commitments and Contingencies (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			9 Months Ended	0 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Apr. 16, 2013 USD ($)	Sep. 30, 2013 2013 U.S Court Decision [Member] USD ($)	Oct. 31, 2013 Subsequent Event [Member] Männer Business [Member] USD ($)	Oct. 31, 2013 Subsequent Event [Member] Männer Business [Member] EUR (€)
Loss Contingencies [Line Items]
IRS proposed adjustments to tax years 2000 through 2002, before penalty and interest			$ 16,500
Potential penalty, percentage of tax assessment			20.00%
Income taxes	4,008	2,342	31,426	9,926		16,389
Expected cash payment of tax, interest and penalties					13,000
Purchase price, before adjustments								275,000
Cash portion of purchase price, before adjustments								247,500
Equity portion of purchase price							$ 36,695	€ 27,500