CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 20,068	$ 11,350	$ 32,659	$ 29,280
Other comprehensive income Securities available-for-sale:
Change in net unrealized gains during the period	18,060	14,246	20,182	26,090
Amortization of losses previously held as available-for-sale		8	5	15
Other comprehensive income	18,060	14,254	20,187	26,105
Income tax expense related to items of other comprehensive income Securities available-for-sale:
Change in net unrealized gain during the period	4,876	3,845	5,449	7,044
Amortization of losses previously held as available-for-sale		2	1	4
Income tax expense related to items of other comprehensive income	4,876	3,847	5,450	7,048
Other comprehensive income, net of tax and reclassifications into net income	13,184	10,407	14,737	19,057
Comprehensive income	$ 33,252	$ 21,757	$ 47,396	$ 48,337