Fair Value - Securities Available for Sale Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
States and Political Subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance		$ 64
Purchases		0
Total gains or (losses):
Included in other comprehensive income (loss)		0
Settlements		64
Transfers into Level 3		0
Transfers out of Level 3		0
Ending Balance	$ 0	0
Corporate Notes and Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	2,250	0
Purchases	6,000	6,750
Total gains or (losses):
Included in other comprehensive income (loss)	76	76
Settlements	0	0
Transfers into Level 3	1,500	3,000
Transfers out of Level 3	0	0
Ending Balance	$ 9,826	$ 9,826