Quarterly report pursuant to sections 13 or 15(d)

Derivative Financial Instruments - Additional Information (Detail)

v2.4.0.8
Derivative Financial Instruments - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2013
Interest Rate Swap [Member]
Jun. 30, 2012
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative termination period     2012-12  
Outstanding derivative contracts $ 0 $ 0    
Interest rate swap liability outstanding       200,000
Interest rate swap agreement, notional value       $ 14,100,000