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Schedule of Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts
Description
Balance at Beginning of Year
Charged to Expenses or Other Accounts, Net
Deductions and Adjustments1
Balance at End of Year
YEAR ENDED DECEMBER 31, 2013
 
 
 
 
Allowance for doubtful accounts
2,749

944

(1,180
)
2,513

YEAR ENDED DECEMBER 31, 2012
 
 
 
 
Allowance for doubtful accounts
2,880

135

(266
)
2,749

YEAR ENDED DECEMBER 31, 2011
 
 
 
 
Allowance for doubtful accounts
3,297

—

(417
)
2,880

1 Deductions and adjustments for the allowances primarily relate to accounts written off.