Schedule II Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2016

Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure

	Balance at Beginning of Period		Provision for (Recovery of) Bad Debt		Deductions/ Write-Offs and Other Charges, Net				Balance at End of Period
Year Ended December 31, 2016
Allowance for doubtful accounts	$	4,307	$	1,924	$	(167	)	*	$	6,064
Year Ended December 31, 2015
Allowance for doubtful accounts	$	4,276	$	1,705	$	(1,674	)	*	$	4,307
Year Ended December 31, 2014
Allowance for doubtful accounts	$	931	$	1,195	$	2,150			$	4,276

* Amounts represent primarily the write-off of certain uncollectible trade receivables that had previously been fully reserved.