Derivative Financial Instruments (Detail) (Nondesignated, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Derivatives, Fair Value [Line Items]
Notional Amount	$ 2,224,478
Treasury Options
Derivatives, Fair Value [Line Items]
Notional Amount	505,000
Eurodollar Futures
Derivatives, Fair Value [Line Items]
Notional Amount	145,000
Forward commitments to sell loans/mortgage-backed securities
Derivatives, Fair Value [Line Items]
Notional Amount	610,000
Forward commitments to buy loans/mortgage-backed securities
Derivatives, Fair Value [Line Items]
Notional Amount	545,000
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Notional Amount	419,478
Other Asset
Derivatives, Fair Value [Line Items]
Unrealized Gain	9,015	[1]
Other Asset | Treasury Options
Derivatives, Fair Value [Line Items]
Unrealized Gain	141	[1]
Other Asset | Forward commitments to sell loans/mortgage-backed securities
Derivatives, Fair Value [Line Items]
Unrealized Gain	26	[1]
Other Asset | Forward commitments to buy loans/mortgage-backed securities
Derivatives, Fair Value [Line Items]
Unrealized Gain	4,956	[1]
Other Asset | Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Unrealized Gain	3,892	[1]
Other Liability
Derivatives, Fair Value [Line Items]
Unrealized Loss	5,724	[1]
Other Liability | Treasury Options
Derivatives, Fair Value [Line Items]
Unrealized Loss	438	[1]
Other Liability | Eurodollar Futures
Derivatives, Fair Value [Line Items]
Unrealized Loss	132	[1]
Other Liability | Forward commitments to sell loans/mortgage-backed securities
Derivatives, Fair Value [Line Items]
Unrealized Loss	5,126	[1]
Other Liability | Forward commitments to buy loans/mortgage-backed securities
Derivatives, Fair Value [Line Items]
Unrealized Loss	$ 28	[1]

[1] Derivatives in a net gain position are recorded as "Other assets" and derivatives in a net loss position are recorded as "Other liabilities" in the Consolidated Statements of Condition.