XML 82 R34.htm IDEA: XBRL DOCUMENT v2.4.0.8
Changes in Allowance for Doubtful Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Changes in Allowance for Doubtful Accounts [Line Items]      
Balance at beginning of year $ 858 $ 1,233 $ 2,241
Provision 908 (153) (981)
Write-offs, net of recoveries 292 (222) (27)
Balance at end of year $ 2,058 $ 858 $ 1,233