Disposed and Discontinued Operations - Statement of Operations for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disposed and Discontinued Operations
Cost of sales	$ (700)		$ (900)	$ (88)
Total operating expense	133		514	31
Operating income from discontinued operations	567		386	57
Other income (expense)	(84)	$ (258)		(261)
Other income (expense)			10,835
Income (loss) from discontinued operations before income taxes	483	(258)	11,221	(204)
Provision (benefit) for income taxes	108	113	2,531	22
Income (loss) from discontinued operations, net of income taxes	$ 375	$ (371)	$ 8,690	$ (226)

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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