Derivatives and Hedging Activities (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Jan. 31, 2014
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in income on derivative (ineffective portion, reclassifications of missed forecasted transactions and amounts excluded from effectiveness testing)	$ (7,121,000)	[1]	$ (5,000)	[1]
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount					250,000,000
Proceeds from derivative instrument	3,900,000
Cash Flow Hedging [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	734,800,000
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Assets Needed for Immediate Settlement, Aggregate Fair Value	10,300,000
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Interest Expense [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	10,300,000
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in income on derivative (ineffective portion, reclassifications of missed forecasted transactions and amounts excluded from effectiveness testing)	$ (7,100,000)

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Financial Statements.