CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 24,828,000	$ 26,859,000	$ 74,382,000	$ 73,638,000
Unrealized gains (losses) on debt securities available for sale:
Net unrealized holding gains (losses) on debt securities available for sale, net of taxes	3,568,000	(2,159,000)	21,453,000	(9,609,000)
Net unrealized gains on debt securities transferred from held to maturity to available for sale, net of taxes			3,417,000
Amounts reclassified from accumulated other comprehensive income, Net of Tax	(212,000)		(75,000)
Net change in unrealized gains (losses) on debt securities available for sale	3,356,000	(2,159,000)	24,795,000	(9,609,000)
Unrealized gains (losses) on cash flow hedges:
Net unrealized holding gains (losses) on cash flow hedges, net of taxes	(598,000)		(598,000)
Amounts reclassified from accumulated other comprehensive income, Net of Tax	6,000		6,000
Net change in unrealized gains (losses) on derivative instruments	(592,000)		(592,000)
Net change in accumulated other comprehensive income (loss)	2,764,000	(2,159,000)	24,203,000	(9,609,000)
Total comprehensive income (loss)	$ 27,592,000	$ 24,700,000	$ 98,585,000	$ 64,029,000