Quarterly report pursuant to Section 13 or 15(d)

Soft Dollar Arrangements - Additional Information (Detail)

v2.4.0.8
Soft Dollar Arrangements - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Soft Dollar Arrangements [Abstract]        
Soft dollar credits $ 263 $ 248 $ 527 $ 496