Credit Risk and Fair Value of Financial Instruments Level 3 (Tables)

12 Months Ended

Dec. 31, 2018

Credit Risk and Fair Value of Financial Instruments [Abstract]

Fair Value, Measurement Inputs, Disclosure [Table Text Block]

The fair value of our debt instruments was as follows:

	Years Ended December 31,
	2018		2017
	(In thousands)
7.625% Senior Notes due October 2018	$	—	$	259,563
4.5% Senior Notes due November 2020	198,930		199,590
8.0% Senior Notes due November 2021	160,800		175,313
5.375% Senior Notes due January 2022	428,188		436,178
5.375% Senior Notes due May 2024	851,275		892,118
4.625% Senior Notes due December 2027	517,077		558,250
7.5% Senior Notes due April 2027	214,940		238,004
Term Loan due December 2022	629,579		675,000
Bank Credit Facility due December 2022	387,061		—
Mortgage notes and other debt, maturities through 2050	4,076		6,036
Total fair value of debt instruments	$	3,391,926	$	3,440,052