Derivative Instruments - Offsetting Derivatives (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Offsetting Derivative Assets
Gross amounts recognized	$ 15,373	$ 3,866
Gross amounts offset in the Consolidated Balance Sheets	0	0
Net amounts presented in the Consolidated Balance Sheets	15,373	3,866
Financial instruments	6,605	3,866
Financial collateral pledged	0	0
Net amounts	8,768	0
Offsetting Derivative Liabilities
Gross amounts recognized	14,021	21,107
Gross amounts offset in the Consolidated Balance Sheets	0	0
Net amounts presented in the Consolidated Balance Sheets	14,021	21,107
Financial instruments	6,605	3,866
Financial collateral pledged	7,416	14,042
Net amounts	$ 0	$ 3,199

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