Securities Available for Sale - Proceeds and Gross Realized Gains and Losses from Sales of Other Securities Available for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 0	$ 0	$ 106,192	[1]	$ 2,396	[1]
Gross realized gains	0	0	708		3
Gross realized losses	$ 0	$ (2)	$ (952)		$ (4)

[1] Prior period amounts have been reclassified to conform to the current period presentation. See “Notes to Condensed Consolidated Financial Statements – Note 1. Summary of Significant Accounting Policies” for additional information.