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BUSINESS COMBINATIONS AND BRANCH SALES - Banco Popular's California Branch Network Acquisition (Details) - Banco Popular North America (BPNA) $ in Thousands		12 Months Ended
	Nov. 08, 2014 USD ($) Branch	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Number of branches | Branch	20
Deposit premiums received	$ 3,900
Purchase price, net of deposit premiums received	24,000
Loans and leases receivable	1,065,088
Deposits	1,076,906
Other intangible assets	15,777
Direct acquisition costs			$ 4,300
Goodwill adjustment		$ 7,700
Loans and leases receivable discount adjustment		7,400
Deposit premium adjustment		292
Loan discount adjustment		(33)
Deposit premium amortization adjustment		$ 110
Core deposit intangibles
Business Acquisition [Line Items]
Other intangible assets	$ 15,800
Amortization period of other intangible assets	10 years

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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