Supplemental Financial Information

12 Months Ended

Dec. 31, 2013

Receivables [Abstract]

Supplemental Financial Information

(17) Supplemental Financial Information

A summary of additions and deductions related to the allowance for doubtful accounts receivable for the years ended December 31, 2013, 2012 and 2011 follows (in thousands):

	Balance at Beginning of Year		Additions		Deductions			Balance at End of Year
Allowance for doubtful accounts receivable:
Year ended December 31, 2013	$	18,905	$	4,696	$	(3,693	)	$	19,908
Year ended December 31, 2012	$	18,803	$	4,195	$	(4,093	)	$	18,905
Year ended December 31, 2011	$	17,540	$	4,267	$	(3,004	)	$	18,803