Annual report pursuant to Section 13 and 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details)

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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Total other intangible assets, gross carrying amount $ 541,316 $ 533,142
Total other intangible assets, accumulated amortization (486,338) (458,471)
Total other intangible assets, net of carrying value 54,978 74,671
Core deposit intangible    
Finite-Lived Intangible Assets [Line Items]    
Total other intangible assets, gross carrying amount 400,058 400,058
Total other intangible assets, accumulated amortization (384,606) (366,907)
Total other intangible assets, net of carrying value 15,452 33,151
Customer relationship    
Finite-Lived Intangible Assets [Line Items]    
Total other intangible assets, gross carrying amount 116,094 107,920
Total other intangible assets, accumulated amortization (76,656) (66,534)
Total other intangible assets, net of carrying value 39,438 41,386
Other    
Finite-Lived Intangible Assets [Line Items]    
Total other intangible assets, gross carrying amount 25,164 25,164
Total other intangible assets, accumulated amortization (25,076) (25,030)
Total other intangible assets, net of carrying value $ 88 $ 134