FIRST BANCORP. (Holding Company Only) Financial Information - Statements of Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income:
Interest income on investment securities	$ 12,725	$ 12,604
Other Interest And Dividend Income	1,073	537
Expense:
Impairement on equity securities	8	0
Gains Losses On Extinguishment Of Debt	4,217	0
Loss before income taxes and equity in undistributed earnings (losses) of subsidiaries	29,067	33,678
Income tax expense	(5,723)	(8,032)
Net income (loss)	23,344	25,646
Other comprehensive income (loss), net of tax	30,391	7,140
Comprehensive (loss) income	53,735	32,786
Holding Company [Member]
Income:
Other Interest And Dividend Income	5	5
Other income	60	56
Total interest income	65	61
Expense:
Notes payable and other borrowings	1,978	1,817
Other operating expenses	650	604
Total operating expenses	2,628	2,421
Gains Losses On Extinguishment Of Debt	4,217	0
Loss before income taxes and equity in undistributed earnings (losses) of subsidiaries	1,654	(2,360)
Equity in undistributed earnings (losses) of subsidiaries	21,690	28,006
Net income (loss)	23,344	25,646
Other comprehensive income (loss), net of tax	30,391	7,140
Comprehensive (loss) income	$ 53,735	$ 32,786