Summary of Interest Rate Agreements (Detail) - Jun. 27, 2015 - Interest Expense [Member] - USD ($)	Total
1.95 % Fixed Interest Rate Due In September 30, 2022 [Member]
Derivative [Line Items]
Fixed Interest Rate	1.95%
Expiration Date	Sep. 30, 2022
Notional Amounts	$ 9,000,000
1.50 % Fixed Interest Rate Due In September 30, 2019 [Member]
Derivative [Line Items]
Fixed Interest Rate	1.50%
Expiration Date	Sep. 30, 2019
Notional Amounts	$ 1,000,000