Fair Value Measurements - Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Total Fair Value and Carrying Value on Balance Sheet [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Interest rate swap	$ 0.4
Level 1 [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Interest rate swap
Level 2 [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Interest rate swap	0.4
Level 3 [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Interest rate swap