Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Prepaid Expenses and Other Current Assets
Non-income tax receivable	$ 4,952	$ 3,879
FinaConnect escrow	2,000	429
Income tax receivable	2,267	1,864
Prepaid technology	1,827	1,318
Prepaid insurance	1,055	552
Other	11,898	8,182
Total prepaid expenses and other current assets	$ 23,999	$ 16,224