Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

The following table provides information on assets and liabilities measured at fair value on a recurring basis. No material events occurred during 2016 requiring adjustment to the recognized balances of assets or liabilities which are recorded at fair value on a nonrecurring basis. As discussed in Note 14, we terminated the interest swap on September 7, 2016.

	Carrying Amount in Consolidated Balance Sheets		Fair Value		Fair Value Measurements Using
					Level 1		Level 2		Level 3
(in thousands)	December 31, 2016
Cash and cash equivalents	$	192,154	$	192,154	$	192,154	$	0	$	0
	December 31, 2015
Cash and cash equivalents	$	93,424	$	93,424	$	93,424	$	0	$	0
Cash deposit for collateralized interest rate swap	26,130		26,130		26,130		0		0
Interest rate swap liability	21,734		21,734		0		21,734		0

Estimated Fair Value Of Long-Term Debt

	December 31, 2016				December 31, 2015
(in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term debt (excluding capital lease obligation)	$	502,505	$	507,925	$	490,920	$	515,302