CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Retained earnings	Accumulated other comprehensive loss
Balance beginning of the period (in shares) at Dec. 31, 2018		103,354,030
Balance beginning of the period at Dec. 31, 2018	$ 1,257,638	$ 1,034	$ 745,926	$ 550,374	$ (39,696)
Comprehensive income:
Net income	25,044			25,044
Other comprehensive income, net	4,661				4,661
Total comprehensive income	29,705			25,044	4,661
Acquisition of Union Community Bank (UCB) (in shares)		2,462,373
Acquisition of Union Community Bank (UCB)	43,288	$ 24	43,264
Exercise of stock options (in shares)		431,782
Exercise of stock options	4,658	$ 4	4,654
Stock-based compensation expense	1,200		1,200
Stock-based compensation forfeited (in shares)		(28,155)
Stock-based compensation forfeited	0
Dividends paid	(18,643)			(18,643)
Balance end of period (in shares) at Mar. 31, 2019		106,220,030
Balance end of the period at Mar. 31, 2019	1,316,276	$ 1,062	795,044	555,205	(35,035)
Balance beginning of the period (in shares) at Dec. 31, 2019		106,859,088
Balance beginning of the period at Dec. 31, 2019	1,353,285	$ 1,069	805,750	583,407	(36,941)
Comprehensive income:
Net income	7,939			7,939
Other comprehensive income, net	8,034				8,034
Total comprehensive income	15,973			7,939	8,034
Exercise of stock options (in shares)		87,305
Exercise of stock options	1,005		1,005
Stock-based compensation expense	1,495		1,495
Stock-based compensation forfeited (in shares)		(12,910)
Stock-based compensation forfeited	0
Dividends paid	(20,317)			(20,317)
Balance end of period (in shares) at Mar. 31, 2020		106,933,483
Balance end of the period at Mar. 31, 2020	$ 1,341,792	$ 1,069	$ 808,250	$ 561,380	$ (28,907)