Operating Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum lease payments for non-cancelable operating leases as of December 31, 2017, are as follows:

	Total
	(In thousands)
Year Ended December 31,
2018	$	42,693
2019	37,980
2020	33,692
2021	29,447
2022	25,566
Thereafter	158,209
Total (1)	$	327,587

(1) Includes $1.3 million of future, non-cancelable sublease payments to be received.