CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 24,085,000	$ 24,862,000	$ 49,554,000	$ 46,779,000
Unrealized net gains/(losses) on securities:
Unrealized net holding gains (losses) arising during period	18,214,000	(1,666,000)	25,014,000	(10,420,000)
Unrealized gains on investment securities transferred from held to maturity to available for sale			4,780,000
Reclassification adjustment for losses (gains) included in net income	10,000		193,000
Other comprehensive income (loss), before tax	18,224,000	(1,666,000)	29,987,000	(10,420,000)
Income tax expense (benefit) related to items of other comprehensive income	5,192,000	(475,000)	8,548,000	(2,970,000)
Other comprehensive income (loss), net of tax	13,032,000	(1,191,000)	21,439,000	(7,450,000)
Comprehensive income	$ 37,117,000	$ 23,671,000	$ 70,993,000	$ 39,329,000