Annual report pursuant to Section 13 and 15(d)

Schedule ii - Valuation and Qualifying Accounts (Detail)

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Schedule ii - Valuation and Qualifying Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 1,087 $ 979 $ 1,370
Additions Charged to Costs and Expenses 3,661 1,794 1,677
Deduction 3,834 [1] (1,686) [1] (2,068) [1]
Balance at End of Year $ 914 $ 1,087 $ 979
[1] Uncollectible accounts written off, net of recoveries.