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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Statement of Comprehensive Income [Abstract] |  |  |
Net Income | $ 50,143 | $ 44,453 | $ 41,482
Other comprehensive income (loss), before tax expense (benefit): |  |  |
Unrealized holding gains (losses) on securities arising during the period | 2,798 | 25,153 | (34,975)
Less: reclassification adjustment for losses (gains) on securities included in net income | 153 | (550) | 1,158
Unrealized holding gains on derivatives arising during the period | 450 | 472 | 0
Reclassification adjustment for gains on derivatives included in net income | (49) | (10) | 0
Unrealized (losses) gains for postretirement obligations: |  |  |
Transition obligation | 0 | 0 | 0
Net (loss) gain | (102) | (313) | 219
Total other comprehensive income (loss), before tax expense (benefit) | 3,250 | 24,752 | (33,598)
Income tax expense (benefit) related to items of other comprehensive income (loss) | 1,137 | 8,663 | (11,751)
Comprehensive Income | $ 52,256 | $ 60,542 | $ 19,635

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