Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) (Derivatives Not Designated as Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 11,306	$ 10,846
Other liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	11,306	10,846
Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	11,306	10,846
Other assets [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 11,306	$ 10,846