Additional Financial Information (Tables)

9 Months Ended

Sep. 30, 2018

Additional Financial Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	September 30,				December 31,
Cash and Cash Equivalents and Restricted Cash		2018		2017		2017		2016
Cash and cash equivalents	$	8,657	$	48,499	$	50,498	$	5,788
Restricted cash in Other current assets		56		6		6		7
Restricted cash in Other Assets		75		241		428		140
Cash and cash equivalents and restricted cash	$	8,788	$	48,746	$	50,932	$	5,935

	Nine months ended
	September 30,
Consolidated Statements of Cash Flows		2018		2017
Cash paid (received) during the period for:
Interest	$	6,943	$	5,031
Income taxes, net of refunds		(537)		1,861