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FAIR VALUES OF FINANCIAL INSTRUMENTS - Reconciliation of Assets Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 9,816		$ 6,326		$ 13,535		$ 3,953
Transfers out of Level 3	0	[1]	0	[1]	(9,185)	[1]	0	[1]
Total gains or losses (realized/unrealized):
Included in earnings—realized	0		0		0		0
Included in earnings—fair value adjustment	110		(79)		(140)		251
Included in other comprehensive income	0		(3)		0		0
Amortization of premium (discount)	0		0		0		0
Additions	7,735		2,836		18,057		5,598
Sales and settlements	(6,285)		(1,860)		(10,891)		(2,582)
Balance at end of period	11,376		7,220		11,376		7,220
Private label residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0		1,706		0		2,214
Transfers out of Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Total gains or losses (realized/unrealized):
Included in earnings—realized	0		0		0		0
Included in earnings—fair value adjustment	0		0		0		0
Included in other comprehensive income	0		(3)		0		0
Amortization of premium (discount)	0		0		0		0
Additions	0		0		0		0
Sales and settlements	0		(1,703)		0		(2,214)
Balance at end of period	0		0		0		0
Mortgage Servicing Rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	9,816		4,620		13,535		1,739
Transfers out of Level 3	0	[1]	0	[1]	(9,185)	[1]	0	[1]
Total gains or losses (realized/unrealized):
Included in earnings—realized	0		0		0		0
Included in earnings—fair value adjustment	110		(79)		(140)		251
Included in other comprehensive income	0		0		0		0
Amortization of premium (discount)	0		0		0		0
Additions	7,735		2,836		18,057		5,598
Sales and settlements	(6,285)		(157)		(10,891)		(368)
Balance at end of period	$ 11,376		$ 7,220		$ 11,376		$ 7,220
[1] The Company’s policy is to recognize transfers in and transfers out as of the actual date of the event or change in circumstances that cause the transfer.

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Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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