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Significant Non-Cash Investing and Financing Activities (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Supplemental Cash Flow Elements [Abstract]      
Other payable issued for purchased customer accounts $ 1,425 $ 25,439  
Notes payable issued or assumed for purchased customer accounts    59 1,603
Estimated acquisition earn-out payables and related charges 5,091 21,479 30,525
Notes received on the sale of fixed assets and customer accounts $ 1,108 $ 967 $ 8,166