Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Financial Instruments Measured on Recurring Basis

The carrying amounts and estimated fair values of our senior notes and interest rate swaps were as follows:

		December 31, 2016				December 31, 2015
Financial Instrument	Fair Value Input Level	Carrying Value		Fair Value		Carrying Value		Fair Value
		(In thousands)
Assets:
Interest rate swaps	Level 2	$	91	$	91	$	304	$	304
Liabilities:
6.0% Senior Notes	Level 2	$	393,393	$	415,500	$	—	$	—
6.5% Senior Notes	Level 2	297,519		308,250		296,752		295,500
Interest rate swaps	Level 2	—		—		114		114
		$	690,912	$	723,750	$	296,866	$	295,614