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CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Changes in AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Balance at Beginning of Period | $ 1,496,264 | $ 1,093,298
Other comprehensive (loss) gain before reclassifications | (14,231) | 1,695
Less: amounts reclassified from accumulated other comprehensive income (loss) | 0 | 3,603
Total other comprehensive loss | (14,231) | (1,908)
Less: amounts reclassified from accumulated other comprehensive income (loss) related to adoption of ASU 2016-01 and ASU 2018-02 | 5,357 |
Balance at End of Period | 1,497,657 | 1,099,553
Net unrealized holding loss on AFS securities |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Balance at Beginning of Period | 6,008 | 15,541
Other comprehensive (loss) gain before reclassifications | (14,231) | 1,964
Less: amounts reclassified from accumulated other comprehensive income (loss) | 0 | 7,857
Total other comprehensive loss | (14,231) | (5,893)
Less: amounts reclassified from accumulated other comprehensive income (loss) related to adoption of ASU 2016-01 and ASU 2018-02 | 4,959 |
Balance at End of Period | (13,182) | 9,648
Net unrealized loss on cash flow hedging derivatives |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Balance at Beginning of Period | 0 | (3,985)
Other comprehensive (loss) gain before reclassifications | 0 | (269)
Less: amounts reclassified from accumulated other comprehensive income (loss) | 0 | (4,254)
Total other comprehensive loss | 0 | 3,985
Less: amounts reclassified from accumulated other comprehensive income (loss) related to adoption of ASU 2016-01 and ASU 2018-02 | 0 |
Balance at End of Period | 0 | 0
Net unrealized holding loss on pension plans |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Balance at Beginning of Period | (1,847) | (1,790)
Other comprehensive (loss) gain before reclassifications | 0 | 0
Less: amounts reclassified from accumulated other comprehensive income (loss) | 0 | 0
Total other comprehensive loss | 0 | 0
Less: amounts reclassified from accumulated other comprehensive income (loss) related to adoption of ASU 2016-01 and ASU 2018-02 | 398 |
Balance at End of Period | (2,245) | (1,790)
Accumulated other comprehensive (loss) income |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Balance at Beginning of Period | 4,161 | 9,766
Total other comprehensive loss | (14,231) | (1,908)
Balance at End of Period | $ (15,427) | $ 7,858

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- Definition Reclassification From AOCI, Accounting Standards Update, Current Period, Net Of Tax, Attributable To Parent + References No definition available. + Details
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- Definition Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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