Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivative assets(a)
Gross Amounts Recognized	$ 24,930	$ 65,596
Derivative Liabilities Offset	(4,629)	(5,322)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	16,182	27,593
Net Amounts Presented on the Consolidated Balance Sheets	4,118	32,681
Gross Amounts Not Offset on the Consolidated Balance Sheets	0	31,837
Net amount	4,118	843
Derivative liabilities(a)
Gross Amounts Recognized	19,537	22,951
Derivative Liability, Fair Value, Gross Asset	4,629	5,322
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	14,680	63
Net Amounts Presented on the Consolidated Balance Sheets	228	17,567
Gross Amounts Not Offset on the Consolidated Balance Sheets	0	17,551
Net amount	$ 228	$ 16