Receivables (Tables)

12 Months Ended

Dec. 31, 2016

Accounts Receivable, Net, Current [Abstract]

Schedule Of Trade Accounts Receivables Net

Accounts receivable – trade, net consisted of the following:

	December 31,
	2016			2015
Accounts receivable - trade	$	231,187		$	220,978
Allowance for doubtful accounts	(6,505		)	(1,446		)
Accounts receivable - trade, net	$	224,682		$	219,532

Schedule Of Allowance For Doubtful Accounts

The following table presents the activity of our allowance for doubtful accounts for the periods indicated:

	December 31,
	2016			2015			2014
Balance at beginning of period	$	1,446		$	2,973		$	1,526
Charged to costs and expenses	6,463			1,242			1,447
Amounts written off	(1,404		)	(2,769		)	—
Balance at end of period	$	6,505		$	1,446		$	2,973