Derivative Financial Instruments - Effect of Master Netting Arrangements on Derivative Assets and Liabilities in the Consolidated Statements of Condition (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Interest Rate Swaps, Gross Amount of Recognized Assets		$ 2,352
Interest Rate Swaps, Gross Amount Offset in the Statement of Condition		0
Interest Rate Swaps, Net Amount of Assets Presented in the Statement of Condition		2,352
Interest Rate Swaps, Financial Instruments		0
Interest Rate Swaps, Net Amount		2,352
Interest Rate Swaps, Gross Amount of Recognized Liabilities	$ 70,611	19,653
Interest Rate Swaps, Gross Amount Offset in the Statement of Condition	0
Interest Rate Swaps, Net Amount of Liabilities Presented in the Statement of Condition	70,611	19,653
Interest Rate Swaps, Financial Instruments	72,526	19,265
Interest Rate Swaps, Cash Collateral Received	0	0
Interest Rate Swaps, Net Amount	$ (1,915)	388
Interest Rate Swaps, Gross Amount Offset in the Statement of Condition		$ 0