Leases - Summary of Leases Table (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating leases - Other assets	$ 10,002
Operating leases - Accrued liabilities	7,560
Operating leases - Other liabilities	$ 3,343
Weighted-average remaining lease term (years)	4 years
Weighted-average discount rate	4.10%