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Significant Accounting Policies and Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 319,529	$ 381,519
Deferred taxes			11,740
Accrued interest receivable		40,570	$ 38,072
Available-for-sale Securities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accrued interest receivable		$ 4,700
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Initial allowance on loans purchased with credit deterioration	$ 200
Financing receivable, purchased with credit deterioration, discount	300
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	(61,475)
Deferred taxes	$ (21,510)

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