Derivative Financial Instruments (Details 4) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Offsetting of financial liabilities and derivative liabilities
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ 243,688	$ 197,463
Gross Amounts Offset in the Statement of Financial Position	4,438	6,218
Net Amounts of Liabilities Presented in the Statement of Financial Position	239,250	191,245
Gross amounts Not Offset in the Statement of Financial Position
Financial Instruments	238,443	190,542
Cash Collateral Pledged	0	0
Net Amount	807	703
Interest rate swaps
Offsetting of financial liabilities and derivative liabilities
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	33,413	53,899
Gross Amounts Offset in the Statement of Financial Position	4,438	6,218
Net Amounts of Liabilities Presented in the Statement of Financial Position	28,975	47,681
Derivative, Collateral, Right to Reclaim Securities	28,168	46,978
Gross amounts Not Offset in the Statement of Financial Position
Cash Collateral Pledged	0	0
Net Amount	807	703
Repurchase agreements
Offsetting of financial liabilities and derivative liabilities
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	210,275	143,564
Net Amounts of Liabilities Presented in the Statement of Financial Position	210,275	143,564
Gross amounts Not Offset in the Statement of Financial Position
Financial Instruments	$ 210,275	$ 143,564