Leases - Maturity of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019	$ 18,489
2020	23,911
2021	21,630
2022	20,535
2023	19,627
2024 and after	143,048
Total future minimum lease payments	247,240
Less lease liability interest	(47,805)
Present value of net future minimum lease payments	$ 199,435