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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Lease Acquired through Acquisition (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding unpaid principal balance at acquisition	$ 0	$ 0	$ 103,799
Cash flows expected to be collected at acquisitions	0	0	114,552
Fair value of acquired loans at acquisition	0	0	90,984
Consumer | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding unpaid principal balance at acquisition	$ 0	$ 0	$ 103,799

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Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
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Amount of cash flows expected to be collected at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

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Amount of contractually required payments receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

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