Accounts Receivable, Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Accounts Receivable Accounts Payable And Accrued Liabilities [Abstract]

Schedule of Accounts Receivable

Accounts receivable consist of the following:

	As of December 31
(in thousands)	2016		2015
Trade accounts receivable, less doubtful accounts
of $26,723 and $27,854	$	591,854	$	553,780
Other receivables	23,247		18,655
	$	615,101	$	572,435

Schedule of Changes in Allowance for Doubtful Accounts and Returns and Allowance for Advertising Rate Adjustments and Discounts

The changes in allowance for doubtful accounts was as follows:

(in thousands)	Balance at Beginning of Period		Additions – Charged to Costs and Expenses		Deductions			Balance at End of Period
2016	$	27,854	$	29,718	$	(30,849	)	$	26,723
2015	$	32,598	$	39,982	$	(44,726	)	$	27,854
2014	$	33,834	$	47,356	$	(48,592	)	$	32,598

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities consist of the following:

	As of December 31
(in thousands)	2016		2015
Accounts payable and accrued liabilities	$	352,356	$	285,321
Accrued compensation and related benefits	148,370		142,693
	$	500,726	$	428,014