Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Estimated Fair Values of Financial Instruments

The estimated fair values of our financial instruments at the dates presented below are as follows:

	June 30,				December 31,
	2017				2016
	Carrying		Fair		Carrying		Fair
(In thousands)	Amount		Value		Amount		Value
Cash and cash equivalents (Level 1)	$	8,519	$	8,519	$	23,001	$	23,001
Borrowings under revolving credit facilities (Level 1)	108,000		108,000		135,000		135,000
Long-term debt (Level 2)	575,000		569,873		575,000		567,875