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Consolidated Statements of Change in Accumulated Other Comprehensive Income (Loss) - Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     $ 458,578 $ 382,658
Reclassification of certain income tax effects from accumulated other comprehensive income     (763)  
Other comprehensive income (loss), net of tax $ (2,027) $ 1,864 (6,512) 2,720
Ending balance 629,861 459,533 629,861 459,533
Unrealized Gains (Losses) on Cash Flow Hedges        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     2,913 2,233
Reclassification of certain income tax effects from accumulated other comprehensive income     687  
Other comprehensive income (loss), net of tax     4,213 (605)
Ending balance 7,813 1,628 7,813 1,628
Unrealized Gains (Losses) on Available-for-Sale Securities        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     (8,000) (9,501)
Reclassification of certain income tax effects from accumulated other comprehensive income     (1,450)  
Other comprehensive income (loss), net of tax     (10,725) 3,325
Ending balance (20,175) (6,176) (20,175) (6,176)
Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     (5,087) (7,268)
Reclassification of certain income tax effects from accumulated other comprehensive income     (763)  
Other comprehensive income (loss), net of tax     (6,512) 2,720
Ending balance $ (12,362) $ (4,548) $ (12,362) $ (4,548)