Derivative Instruments and Hedging Activities - Fair Value of Company's Derivative Financial Instruments Classification on Unaudited Condensed Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value
Other Assets [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities Derivatives Fair Value	238
Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Liabilities Derivatives Fair Value	$ 238