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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Statement of Comprehensive Income [Abstract]          
Unrealized holding (loss)/gain on securities arising during the period, income tax expense (benefit) $ 7,100 $ 4,500 $ (1,300) $ 11,600 $ (5,200)
Reclassification adjustment for net (gains) losses on sale of securities included in net income, income tax expense (benefit) $ 61 $ 121 $ 90 $ 182 $ 91