Leases - Maturity Analysis of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
Nine months ending December 31, 2019	$ 3,975
Year ending December 31, 2020	5,120
Year ending December 31, 2021	4,737
Year ending December 31, 2022	4,638
Year ending December 31, 2023	3,246
Thereafter	9,202
Total undiscounted lease payments	30,918
Less: imputed interest	6,932
Total lease liabilities	23,986
Finance Leases
Nine months ending December 31, 2019	92
Year ending December 31, 2020	123
Year ending December 31, 2021	123
Year ending December 31, 2022	100
Year ending December 31, 2023	55
Thereafter	73
Total undiscounted lease payments	566
Less: imputed interest	76
Total lease liabilities	$ 490