Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Net write-up of equity securities	$ 0
Equity securities	24,228	$ 19,225
Equity securities	30,514	25,216
Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity securities	19,228	19,225
Equity securities	19,228	19,225
Fair Value, Inputs, Level 2
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity securities	5,000	0
Equity securities	5,000	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Individually evaluated loans	35,499	23,584
Provision for credit losses	4,608	4,405
Equity securities		19,134
Equity securities		5,690
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount	46	971
OREO(b)	$ 70	$ 2,196