SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2015

Valuation and Qualifying Accounts [Abstract]

SCHEDULE II. VALUTAION AND QUALIFYING ACCOUNTS

SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS

Allowance for Doubtful Accounts

The transactions in the allowance for doubtful accounts for the years ended December 31 were as follows (in thousands):

	2015			2014			2013
Balance, beginning of year	$	41,051		$	39,292		$	34,560
Provision	11,538			15,092			15,587
Write-offs	(9,134		)	(13,333		)	(10,855		)
Balance, end of year	$	43,455		$	41,051		$	39,292