Premises, Furniture, and Equipment (Details) - Narrative $ in Thousands			12 Months Ended
		Sep. 27, 2016 USD ($) renewal_option retail_branch	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Property, Plant and Equipment [Line Items]
Aggregate cash purchase price		$ 150,300
Number of branches sold | retail_branch		55
Net book value of properties		$ 58,800
Renewal term of lease for sale-leaseback transaction		14 years
Number of lease renewal options | renewal_option		5
Pre-tax gain on sale-leaseback transaction		$ 88,000
Net gain on sale-leaseback transaction		5,500	$ 5,509	$ 0	$ 0
Deferred gain, net		82,500	81,000
Current period gain recognized on sale-leaseback transaction	[1]		1,473	0	0
First year rent expense due under sale-leaseback transaction		$ 10,500
Percentage of rent escalation under sale-leaseback transaction		1.50%
Depreciation of premises, furniture, and equipment			12,804	$ 13,367	12,224
Intangible liabilities			$ 8,093
Popular Community Bank
Property, Plant and Equipment [Line Items]
Intangible liabilities					$ 10,600
Five Year Renewal Period
Property, Plant and Equipment [Line Items]
Renewal term of lease for sale-leaseback transaction		5 years

[1] Included as reductions to net occupancy and equipment expense in the Consolidated Statements of Income.