Long Lived Assets (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Client contracts
Summary of aggregate amortization
Total amortization expense	$ 15,401	$ 19,367	$ 23,545
Client contracts | Investments in client contracts
Summary of aggregate amortization
Total amortization expense	5,165	6,409	6,181
Client contracts | Capitalized costs
Summary of aggregate amortization
Total amortization expense	1,334	1,007	2,365
Client contracts | Acquired client contracts
Summary of aggregate amortization
Total amortization expense	8,902	11,951	14,999
Software
Summary of aggregate amortization
Total amortization expense	11,129	11,861	11,854
Software | Acquired software
Summary of aggregate amortization
Total amortization expense	3,081	3,457	4,221
Software | Internal use software
Summary of aggregate amortization
Total amortization expense	$ 8,048	$ 8,404	$ 7,633