Derivatives and Hedging Activities (Schedule of Interest Rate Derivatives) (Detail) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014 Derivative
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Number of Instruments	6
Derivative, Notional Amount	$ 234,316
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Number of Instruments	17
Derivative, Notional Amount	$ 1,174,367