Schedule II Valuation and Qualifying

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Schedule II Valuation and Qualifying Accounts

Schedule II. Valuation and Qualifying Accounts for the Years Ended December 31, 2017, 2016 and 2015

	Balance at Beginning of Year		Charged (Credited) to Expenses			Charged (Credited) to Other Accounts			Balance at End of Year
Deferred income tax asset:
Valuation allowance
2015	$	27,087	$	(6,485	)	$	(6,750	)	$	13,852
2016	$	13,852	$	(345	)	$	(660	)	$	12,847
2017	$	12,847	$	13,925		$	5,260		$	32,032

	Balance at Beginning of Year		Charged (Credited) to Expenses		Charged (Credited) to Other Accounts			Balance at End of Year
Accounts receivable:
Allowance for doubtful accounts
2015	$	—	$	—	$	—		$	—
2016	$	—	$	—	$	—		$	—
2017	$	—	$	2,404	$	(1,223	)	$	1,181