Allowance for Uncollectible Accounts (Tables)

12 Months Ended

Dec. 31, 2013

Valuation And Qualifying Accounts [Abstract]

Allowance for Uncollectible Accounts Activity and Ending Balances

The following table summarizes the activity and ending balances in the allowance for uncollectible accounts (amounts in thousands):

	Beginning of Year Balance		Additions		Deductions		End of Year Balance
Year ended December 31:
2013	$	11,863	$	13,929	$	11,458	$	14,334
2012	$	10,692	$	11,875	$	10,704	$	11,863
2011	$	9,769	$	12,320	$	11,397	$	10,692