|
Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
|
Jun. 30, 2011
Agreement
|
|---|---|---|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
| Number of interest rate swap agreements | 2 | |
| Notional amount of borrowings | $ 73.0 | |
| Interest rate derivatives fixed interest rate | 3.878% | |
| Fair value of the interest rate swap liability | $ 0.1 |