Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Condensed Statements of Comprehensive Income
Net income	$ 13,171	$ 11,306	$ 36,852	$ 34,152
Other comprehensive income (loss):
Unrealized gains (losses) on securities available for sale	1,192	(2,058)	9,084	(6,487)
Reclassification adjustment for securities gains Included in net income	(11)	(76)	(11)	(76)
Income tax expense (benefit)	(247)	448	(1,906)	1,378
Net of tax amount	934	(1,686)	7,167	(5,185)
Change in unrealized gain/(loss) on postretirement benefit:
Reclassification adjustment for deferred tax on defined benefit postretirement medical plan	0	0	82	0
Net of tax amount	0	0	82	0
Total other comprehensive income (loss)	934	(1,686)	7,249	(5,185)
Comprehensive income	$ 14,105	$ 9,620	$ 44,101	$ 28,967