Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - Interest Rate Contracts - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0	$ 135
Derivatives Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	1,444	688
Derivatives Not Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	27,855	11,948
Derivatives Not Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 27,855	$ 11,948