Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 9,312	$ 3,818
Other comprehensive income (loss):
Unrealized income arising during the period on available-for-sale securities, net of income taxes impact, respectively		1	250
Reclassification adjustment for net gain on sales of available-for-sale securities included in net income, net of income taxes impact, respectively	[1]		(104)
Change in defined benefit plans, net of income taxes impact, respectively	[2]	600	(537)
Reclassification adjustment for other activity related to benefit plans, net of income taxes respectively	[3]	(43)	(4)
Total other comprehensive income (loss)		558	(395)
Total comprehensive income		$ 9,870	$ 3,423

[1] Amounts are included in net gain on sales of investment securities on the Consolidated Statements of Income as a separate element within total noninterest income.

[2] The change in defined benefit plans consists primarily of unrecognized actuarial gains (losses) on defined benefit plans during the period.

[3] The reclassification adjustment for benefit plans includes settlement gains, and amortization of prior service costs.  Amounts are included in other income on the Consolidated Statements of Income within total noninterest income.  Please reference Note 11 – Defined Benefit Plans, for more information.