LOAN PORTFOLIO - Impaired loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jun. 30, 2014
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	$ 243,441		$ 243,441		$ 341,485
Unpaid Principal Balance with no Related Allowance	279,313		279,313		392,392
Average Recorded Investment No Related Allowance	253,761				352,949
Interest Income with no Related Allowance Accrual Basis	711		2,050
Interest Income with No Related Allowance Cash Basis	1,042		2,634
Recorded Investment with Related Allowance	729,573		729,573		577,627
Unpaid Principal Balance with Related Allowance	831,927		831,927		641,834
Related Allowance	55,284	106,175	55,284	106,175	102,601	68,358
Average Recorded Investment With Related Allowance	747,019				592,928
Interest Income with Related Allowance Accrual Basis	6,860		17,271
Interest Income with Realted Allowance Cash Basis	967		3,694
Recorded Investment	973,014	904,509	973,014	904,509	919,112	908,858
Unpaid Principal Balance	1,111,240		1,111,240		1,034,226
Average Recorded Investments	1,000,780				945,877
Interest Income on Impaired Loans Accrual Basis	7,571	7,400	19,321	19,300
Interest Income on Impaired Loans Cash Basis	2,009	1,400	6,328	4,300
Fhava Guaranteed Loans [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	0		0		0
Unpaid Principal Balance with no Related Allowance	0		0		0
Average Recorded Investment No Related Allowance	0				0
Interest Income with no Related Allowance Accrual Basis	0		0
Interest Income with No Related Allowance Cash Basis	0		0
Recorded Investment with Related Allowance	0		0		0
Unpaid Principal Balance with Related Allowance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment With Related Allowance	0				0
Interest Income with Related Allowance Accrual Basis	0		0
Interest Income with Realted Allowance Cash Basis	0		0
Recorded Investment	0		0		0
Unpaid Principal Balance	0		0		0
Average Recorded Investments	0				0
Interest Income on Impaired Loans Accrual Basis	0		0
Interest Income on Impaired Loans Cash Basis	0		0
Other Residential Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	88,126		88,126		220,428
Unpaid Principal Balance with no Related Allowance	99,529		99,529		237,709
Average Recorded Investment No Related Allowance	91,683				222,617
Interest Income with no Related Allowance Accrual Basis	372		829
Interest Income with No Related Allowance Cash Basis	242		553
Recorded Investment with Related Allowance	333,697		333,697		190,566
Unpaid Principal Balance with Related Allowance	371,553		371,553		212,028
Related Allowance	11,658		11,658		18,125
Average Recorded Investment With Related Allowance	337,227				193,372
Interest Income with Related Allowance Accrual Basis	3,713		10,864
Interest Income with Realted Allowance Cash Basis	594		1,799
Recorded Investment	421,823		421,823		410,994
Unpaid Principal Balance	471,082		471,082		449,737
Average Recorded Investments	428,910				415,989
Interest Income on Impaired Loans Accrual Basis	4,085		11,693
Interest Income on Impaired Loans Cash Basis	836		2,352
Commercial Mortgage Loans [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	103,282		103,282		69,484
Unpaid Principal Balance with no Related Allowance	116,016		116,016		73,723
Average Recorded Investment No Related Allowance	105,065				71,367
Interest Income with no Related Allowance Accrual Basis	286		1,059
Interest Income with No Related Allowance Cash Basis	536		1,512
Recorded Investment with Related Allowance	135,050		135,050		149,888
Unpaid Principal Balance with Related Allowance	159,717		159,717		163,656
Related Allowance	14,128		14,128		32,189
Average Recorded Investment With Related Allowance	142,484				153,992
Interest Income with Related Allowance Accrual Basis	390		1,179
Interest Income with Realted Allowance Cash Basis	203		1,126
Recorded Investment	238,332		238,332		219,372
Unpaid Principal Balance	275,733		275,733		237,379
Average Recorded Investments	247,549				225,359
Interest Income on Impaired Loans Accrual Basis	676		2,238
Interest Income on Impaired Loans Cash Basis	739		2,638
Commercial And Industrial Loan [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	44,683		44,683		32,418
Unpaid Principal Balance with no Related Allowance	54,955		54,955		56,831
Average Recorded Investment No Related Allowance	49,686				37,946
Interest Income with no Related Allowance Accrual Basis	0		0
Interest Income with No Related Allowance Cash Basis	240		518
Recorded Investment with Related Allowance	196,730		196,730		154,686
Unpaid Principal Balance with Related Allowance	224,723		224,723		170,191
Related Allowance	21,267		21,267		26,686
Average Recorded Investment With Related Allowance	197,862				162,786
Interest Income with Related Allowance Accrual Basis	1,897		3,033
Interest Income with Realted Allowance Cash Basis	24		380
Recorded Investment	241,413		241,413		187,104
Unpaid Principal Balance	279,678		279,678		227,022
Average Recorded Investments	247,548				200,732
Interest Income on Impaired Loans Accrual Basis	1,897		3,033
Interest Income on Impaired Loans Cash Basis	264		898
Construction Loans [Member]
Financing Receivable Impaired [Line Items]
Related Allowance	2,936	21,785	2,936	21,785
Recorded Investment	39,441	73,482	39,441	73,482
Consumer Auto Loans [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	0		0		0
Unpaid Principal Balance with no Related Allowance	0		0		0
Average Recorded Investment No Related Allowance	0				0
Interest Income with no Related Allowance Accrual Basis	0		0
Interest Income with No Related Allowance Cash Basis	0		0
Recorded Investment with Related Allowance	15,733		15,733		14,121
Unpaid Principal Balance with Related Allowance	15,733		15,733		14,122
Related Allowance	2,388		2,388		1,829
Average Recorded Investment With Related Allowance	16,692				12,937
Interest Income with Related Allowance Accrual Basis	264		810
Interest Income with Realted Allowance Cash Basis	0		0
Recorded Investment	15,733		15,733		14,121
Unpaid Principal Balance	15,733		15,733		14,122
Average Recorded Investments	16,692				12,937
Interest Income on Impaired Loans Accrual Basis	264		810
Interest Income on Impaired Loans Cash Basis	0		0
Finance Leases [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	0		0		0
Unpaid Principal Balance with no Related Allowance	0		0		0
Average Recorded Investment No Related Allowance	0				0
Interest Income with no Related Allowance Accrual Basis	0		0
Interest Income with No Related Allowance Cash Basis	0		0
Recorded Investment with Related Allowance	2,163		2,163		2,359
Unpaid Principal Balance with Related Allowance	2,163		2,163		2,359
Related Allowance	170		170		73
Average Recorded Investment With Related Allowance	2,410				2,219
Interest Income with Related Allowance Accrual Basis	44		151
Interest Income with Realted Allowance Cash Basis	0		0
Recorded Investment	2,163		2,163		2,359
Unpaid Principal Balance	2,163		2,163		2,359
Average Recorded Investments	2,410				2,219
Interest Income on Impaired Loans Accrual Basis	44		151
Interest Income on Impaired Loans Cash Basis	0		0
Other Consumer Loans [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	1,641		1,641		4,035
Unpaid Principal Balance with no Related Allowance	2,939		2,939		4,450
Average Recorded Investment No Related Allowance	1,637				3,325
Interest Income with no Related Allowance Accrual Basis	5		19
Interest Income with No Related Allowance Cash Basis	18		41
Recorded Investment with Related Allowance	12,468		12,468		8,410
Unpaid Principal Balance with Related Allowance	13,172		13,172		8,919
Related Allowance	2,737		2,737		1,555
Average Recorded Investment With Related Allowance	12,561				8,919
Interest Income with Related Allowance Accrual Basis	537		1,192
Interest Income with Realted Allowance Cash Basis	11		23
Recorded Investment	14,109		14,109		12,445
Unpaid Principal Balance	16,111		16,111		13,369
Average Recorded Investments	14,198				12,244
Interest Income on Impaired Loans Accrual Basis	542		1,211
Interest Income on Impaired Loans Cash Basis	29		64
Commercial Construction [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	0		0		0
Unpaid Principal Balance with no Related Allowance	0		0		0
Average Recorded Investment No Related Allowance	0				0
Interest Income with no Related Allowance Accrual Basis	0		0
Interest Income with No Related Allowance Cash Basis	0		0
Recorded Investment with Related Allowance	11,790		11,790		16,022
Unpaid Principal Balance with Related Allowance	11,790		11,790		16,238
Related Allowance	790		790		8,873
Average Recorded Investment With Related Allowance	11,944				16,157
Interest Income with Related Allowance Accrual Basis	0		0
Interest Income with Realted Allowance Cash Basis	128		344
Recorded Investment	11,790		11,790		16,022
Unpaid Principal Balance	11,790		11,790		16,238
Average Recorded Investments	11,944				16,157
Interest Income on Impaired Loans Accrual Basis	0		0
Interest Income on Impaired Loans Cash Basis	128		344
Residential Construction [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	4,706		4,706		14,761
Unpaid Principal Balance with no Related Allowance	4,802		4,802		19,313
Average Recorded Investment No Related Allowance	4,681				17,334
Interest Income with no Related Allowance Accrual Basis	42		125
Interest Income with No Related Allowance Cash Basis	2		5
Recorded Investment with Related Allowance	10,911		10,911		13,864
Unpaid Principal Balance with Related Allowance	14,147		14,147		13,973
Related Allowance	1,208		1,208		2,816
Average Recorded Investment With Related Allowance	12,322				13,640
Interest Income with Related Allowance Accrual Basis	0		0
Interest Income with Realted Allowance Cash Basis	0		0
Recorded Investment	15,617		15,617		28,625
Unpaid Principal Balance	18,949		18,949		33,286
Average Recorded Investments	17,003				30,974
Interest Income on Impaired Loans Accrual Basis	42		125
Interest Income on Impaired Loans Cash Basis	2		5
Land Construction [Member]
Financing Receivable Impaired [Line Items]
Recorded Investment with no Related Allowance	1,003		1,003		359
Unpaid Principal Balance with no Related Allowance	1,072		1,072		366
Average Recorded Investment No Related Allowance	1,009				360
Interest Income with no Related Allowance Accrual Basis	6		18
Interest Income with No Related Allowance Cash Basis	4		5
Recorded Investment with Related Allowance	11,031		11,031		27,711
Unpaid Principal Balance with Related Allowance	18,929		18,929		40,348
Related Allowance	938		938		10,455
Average Recorded Investment With Related Allowance	13,517				28,906
Interest Income with Related Allowance Accrual Basis	15		42
Interest Income with Realted Allowance Cash Basis	7		22
Recorded Investment	12,034		12,034		28,070
Unpaid Principal Balance	20,001		20,001		40,714
Average Recorded Investments	14,526				29,266
Interest Income on Impaired Loans Accrual Basis	21		60
Interest Income on Impaired Loans Cash Basis	$ 11		$ 27