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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Leases Sold and Purchased (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 59,481	$ 0	$ 91,247
Sales	0	0	(169,154)
Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	91,247
Sales	0	0	(19,741)
Consumer | Single family residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	59,481	0	0
Sales	$ 0	$ 0	$ (149,413)

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+ References

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The amount of any significant purchases of financing receivables during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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The amount of any significant sales of financing receivables during the reporting period.

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