Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Cash and Cash Equivalents [Line Items]
Right of use assets, included in Other assets	$ 17,527	$ 14,499
Operating lease liabilities, included in Other liabilities	18,439	$ 13,908
Cash
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 672