REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES (Tables)

9 Months Ended

Sep. 30, 2017

Commitments And Contingencies Disclosure [Abstract]

Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations [Text Block]

The Corporation's and its banking subsidiary's regulatory capital positions as of September 30, 2017 and December 31, 2016 were as follows:
	Regulatory Requirements
	Actual			For Capital Adequacy Purposes			To be Well-Capitalized-General Thresholds
	Amount		Ratio	Amount		Ratio	Amount		Ratio
(Dollars in thousands)
As of September 30, 2017
Total Capital (to
Risk-Weighted Assets)
First BanCorp.	$	1,957,282	22.18%	$	705,895	8.0%		N/A	N/A
FirstBank	$	1,914,708	21.71%	$	705,618	8.0%	$	882,022	10.0%
Common Equity Tier 1 Capital
(to Risk-Weighted Assets)
First BanCorp.	$	1,642,777	18.62%	$	397,066	4.5%		N/A	N/A
FirstBank	$	1,530,926	17.36%	$	396,910	4.5%	$	573,314	6.5%
Tier I Capital (to
Risk-Weighted Assets)
First BanCorp.	$	1,642,777	18.62%	$	529,421	6.0%		N/A	N/A
FirstBank	$	1,802,621	20.44%	$	529,213	6.0%	$	705,618	8.0%
Leverage ratio
First BanCorp.	$	1,642,777	13.96%	$	470,583	4.0%		N/A	N/A
FirstBank	$	1,802,621	15.34%	$	469,985	4.0%	$	587,481	5.0%
As of December 31, 2016
Total Capital (to
Risk-Weighted Assets)
First BanCorp.	$	1,921,329	21.34%	$	720,329	8.0%		N/A	N/A
FirstBank	$	1,872,120	20.80%	$	720,091	8.0%	$	900,114	10.0%
Common Equity Tier 1 Capital
(to Risk-Weighted Assets)
First BanCorp.	$	1,597,117	17.74%	$	405,185	4.5%		N/A	N/A
FirstBank	$	1,523,332	16.92%	$	405,051	4.5%	$	585,074	6.5%
Tier I Capital (to
Risk-Weighted Assets)
First BanCorp.	$	1,597,117	17.74%	$	540,247	6.0%		N/A	N/A
FirstBank	$	1,757,642	19.53%	$	540,068	6.0%	$	720,091	8.0%
Leverage ratio
First BanCorp.	$	1,597,117	13.70%	$	466,376	4.0%		N/A	N/A
FirstBank	$	1,757,642	15.10%	$	465,740	4.0%	$	582,174	5.0%