Leases - Other Information Related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating cash flows - operating leases	$ 29,783
Operating cash flows from finance leases	69
Financing cash flows from finance leases	583	$ 0
Lease liabilities arising from new ROU assets, Operating leases	8,819
Lease liabilities arising from new ROU assets, Finance leases	$ 172
Weighted Average remaining lease term, Operating leases	9 years 7 months 6 days
Weighted Average remaining lease term, Finance leases	2 years 10 months 24 days
Weighted Average Discount Rate, Operating leases	5.70%
Weighted Average Discount Rate, Finance leases	4.20%