Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt [Abstract]

Schedule of Debt [Table Text Block]

Long-term debt at December 31, 2017 and 2016 consists of the following:

(In thousands)	December 31, 2017		December 31, 2016
Senior secured term loan facility due 2021	$	133,850	$	233,850
Senior unsecured notes due 2022	—		360,000
Senior unsecured notes due 2026	550,000		—
	683,850		593,850
Unamortized discount and debt issuance costs	9,470		9,173
Total long-term debt	674,380		584,677
Less current maturities of long-term debt	100,000		100,000
Long-term debt less current maturities	$	574,380	$	484,677

Schedule of Maturities of Long-term Debt [Table Text Block]

Annual maturities of long-term debt contractually due as of December 31, 2017 are as follows:

Fiscal year ending December 31	(In thousands)
2018	$	—
2019	—
2020	—
2021	133,850
2022	—
Thereafter	550,000
	$	683,850