INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current expense
Federal								$ 32,171	$ 27,980	$ 25,129
State								17,004	14,359	13,672
Total current expense								49,175	42,339	38,801
Deferred expense (benefit)
Federal								(10,872)	9,080	(3,080)
State								(6,634)	1,514	(1,417)
Total deferred expense (benefit)								(17,506)	10,594	(4,497)
Total expense	$ 11,199	$ 7,779	$ 2,148	$ 14,368	$ 17,036	$ 10,007	$ 11,522	$ 31,669	$ 52,933	$ 34,304