Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 9,148	$ 10,841
Other comprehensive income (loss):
Change in net unrealized holding gains (losses) on available-for-sale securities	(8,850)	8,417
Change in funded status of pension plan		88
Change in net unrealized loss on derivative instruments	(3,764)	(1,545)
Other comprehensive income (loss) before income taxes	(12,614)	6,960
Income tax expense (benefit)	(3,778)	2,098
Other comprehensive income (loss)	(8,836)	4,862
Comprehensive income	$ 312	$ 15,703

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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