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Changes In Accumulated Other Comprehensive Income (Loss) By Component (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | $ 920,964 | $ 855,872 | $ 553,902 |
Ending balance | 956,816 | 920,964 | 855,872 |
Reclassification, available for sale debt securities, before tax | (18,659) | 8,800 | (7,237) |
Unrealized gains (losses), available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (249) | (2,681) |  |
Balance after reclassification adjustments |  | (1,458) |  |
Other comprehensive income (loss) before reclassifications | (34,091) | 7,800 |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 13,808 | (5,368) |  |
Net current-period other comprehensive income (loss) | (20,283) | 2,432 |  |
Ending balance | (21,741) | (249) | (2,681) |
Foreign currency items, available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 88 | 0 |  |
Balance after reclassification adjustments |  | 0 |  |
Other comprehensive income (loss) before reclassifications | 0 | 88 |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 0 | 0 |  |
Net current-period other comprehensive income (loss) | 0 | 88 |  |
Ending balance | 0 | 88 | 0 |
Total unrealized gains (losses), available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (161) | (2,681) |  |
Balance after reclassification adjustments |  | (1,458) |  |
Other comprehensive income (loss) before reclassifications | (34,091) | 7,888 |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 13,808 | (5,368) |  |
Net current-period other comprehensive income (loss) | (20,283) | 2,520 |  |
Ending balance | (21,741) | (161) | (2,681) |
Unrealized loss on cash flow hedge |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (198) | (2,211) |  |
Balance after reclassification adjustments |  | (240) |  |
Other comprehensive income (loss) before reclassifications | 1,477 | 406 |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income | (2,159) | 1,607 |  |
Net current-period other comprehensive income (loss) | (682) | 2,013 |  |
Ending balance | (922) | (198) | (2,211) |
Accumulated other comprehensive income (loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (359) | (4,892) | (7,984) |
Balance after reclassification adjustments |  | (1,698) |  |
Other comprehensive income (loss) before reclassifications | (32,614) | 8,294 |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income | 11,649 | (3,761) |  |
Net current-period other comprehensive income (loss) | (20,965) | 4,533 |  |
Ending balance | (22,663) | (359) | $ (4,892) |
Gain on Investments |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Reclassification, available for sale debt securities, before tax | 18,700 | 8,800 |  |
Reclassification, available for sale debt securities, after tax | 13,800 | 5,400 |  |
Interest expense |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Reclassification, cash flow hedge, before tax | 95 |  |  |
Reclassification, cash flow hedge, after tax | 70 |  |  |
Non-interest income |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Reclassification, cash flow hedge, before tax | 2,800 | 2,600 |  |
Reclassification, cash flow hedge, after tax | 2,100 | $ 1,600 |  |
Accounting Standards Update 2018-02 |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment | 0 |  |  |
Accounting Standards Update 2018-02 | Unrealized gains (losses), available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | $ (256)
Accounting Standards Update 2018-02 | Foreign currency items, available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | 0
Accounting Standards Update 2018-02 | Total unrealized gains (losses), available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | (256)
Accounting Standards Update 2018-02 | Unrealized loss on cash flow hedge |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | (42)
Accounting Standards Update 2018-02 | Accumulated other comprehensive income (loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment | (298) |  |  | (298)
Accounting Standards Update 2016-01 |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment | 0 |  |  |
Accounting Standards Update 2016-01 | Unrealized gains (losses), available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | (953)
Accounting Standards Update 2016-01 | Foreign currency items, available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | (88)
Accounting Standards Update 2016-01 | Total unrealized gains (losses), available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | (1,041)
Accounting Standards Update 2016-01 | Unrealized loss on cash flow hedge |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | 0
Accounting Standards Update 2016-01 | Accumulated other comprehensive income (loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment | $ (1,041) |  |  | (1,041)
Combined effect of multiple accounting pronouncements on components of shareholders' equity | Accumulated other comprehensive income (loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |
Cumulative effect adjustment |  |  |  | $ (1,300)

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