Leases - Supplemental Cash Flow (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating cash flow from operating leases	$ 3,415
ROU assets obtained in exchange for lease obligations, operating leases	24,212
Reductions to ROU assets resulting from reductions to lease obligations, operating leases	$ (2,572)
Weighted average remaining lease term, operating lease	4 years
Weighted average discount rate, operating lease	4.49%