Financial Statements Schedules Schedule III. Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2018

Schedule V. Valuation and Qualifying Accounts [Abstract]

Summary of Valuation Allowance [Table Text Block]

Valuation and Qualifying Accounts

(in thousands)
	Balance at Beginning of Year		Charged to Income Tax (Benefit) Expense		Tax Act Rate Change			Disposals and Other			Balance at End of Year
Valuation Allowance for Deferred Tax Assets:
Year Ended December 31, 2018	$	173,965	$	4,562	$	—		$	(7,071	)	$	171,456
Year Ended December 31, 2017	$	268,418	$	3,169	$	(105,598	)	$	7,976		$	173,965