Leases - Future Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2019	$ 10,474
2020	16,509
2021	13,167
2022	9,326
2023	3,770
Thereafter	6,899
Total present value of lease payments	60,145
Less present value discount	3,647
Total lease liability	$ 56,498	$ 60,000