Income Taxes (Tables)

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Income tax expense (benefit), income (loss) before income taxes and the corresponding effective tax rate for the three and nine months ended September 30, 2019 and 2018 were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Income tax expense (benefit)	$	(574	)	$	(1,190	)	$	45,996		$	19,831
Income (loss) before income taxes	(16,172		)	31,474			171,532			153,113
Effective tax rate	4		%	(4		)%	27		%	13		%