Accrued Expenses and Other Liabilities - Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accrued Liabilities and Other Liabilities [Abstract]
Deferred rent	$ 0	$ 7,569
Deferred tax liability	7,535	5,181
Acquisition holdback	3,750	2,290
Finance		2,170
Accrued other expenses	6,462	959
Total other long-term liabilities	$ 17,747	$ 18,169