HEDGES AND OTHER DERIVATIVE FINANCIAL INSTRUMENTS - Additional Information (Detail) (USD $)		1 Months Ended			1 Months Ended
	Jan. 31, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jan. 31, 2013 Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member]	Sep. 30, 2013 Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member]	Dec. 31, 2012 Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member]	Aug. 31, 2013 Total Return Swap [Member] Not designated as hedging instrument [Member] Fair Value Hedging [Member]	Sep. 30, 2013 Total Return Swap [Member] Not designated as hedging instrument [Member] Fair Value Hedging [Member]
Derivatives And Hedging Activities [Line Items]
Notional Value of Interest-Rate Swap	$ 175,000,000
Notional Value of Derivatives designated as cash flow hedge		168,800,000	386,300,000	240,000,000
Derivative, Fixed Interest Rate (as a percent)		2.60%
Derivative, Remaining Maturity (in years)		4 years
Derivative, Average Remaining Maturity (in years)					2 years
Derivative, Collateral, Right to Reclaim Cash						40,000,000
Contract amount					$ 200,000,000	$ 135,561,000