Leases - Supplemental Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Operating leases
Weighted average remaining lease term	10 years 2 months 12 days		10 years 2 months 12 days		3 years 1 month 6 days
Weighted average discount rate	5.90%		5.90%		7.10%
ROU assets obtained in exchange for lease obligations
Operating leases	$ 32,292	$ 263	$ 34,490	$ 1,525
Finance leases	$ 0	$ 4	$ 11	$ 4