Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Offsetting Liabilities
Gross Amounts Recognized	$ 380,564	$ 450,487
Gross Amounts Offset	0	0
Net Amounts Presented	380,564	450,487
Gross Amounts Not Offset, Financial Instruments	(300,000)	(300,000)
Gross Amounts Not Offset, Cash Collateral	(72,732)	(150,487)
Net Amount	7,832	0
Repurchase agreements
Offsetting Repurchase Agreement Liabilities
Gross Amounts Recognized	300,000	300,000
Gross Amounts Offset	0	0
Net Amounts Presented	300,000	300,000
Gross Amounts Not Offset, Financial Instruments	(300,000)	(300,000)
Gross Amounts Not Offset, Cash Collateral	0	0
Net Amount	0	0
Interest rate swaps
Offsetting Assets
Gross Amounts Recognized	248,520	150,487
Gross Amounts Offset	0	0
Net Amounts Presented	248,520	150,487
Gross Amounts Not Offset, Financial Instruments	0	0
Gross Amounts Not Offset, Cash Collateral	0	0
Net Amount	248,520	150,487
Offsetting Liabilities
Gross Amounts Recognized	80,564	150,487
Gross Amounts Offset	0	0
Net Amounts Presented	80,564	150,487
Gross Amounts Not Offset, Financial Instruments	0	0
Gross Amounts Not Offset, Cash Collateral	(72,732)	(150,487)
Net Amount	$ 7,832	$ 0