Leases - Adoption of ASC 842 (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	$ 2,265
Lease liability	2,410
Accrued expenses and other liabilities	$ 16,518		$ 14,786
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset		$ 2,700
Lease liability		2,900
Accrued expenses and other liabilities		$ 200