Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Components of Debt

Debt consists of the following at:

	December 31,
	2014		2013
	(in thousands)
$400 million senior unsecured notes with an effective interest rate of 6.0% at December 31, 2014 and 2013	$	400,000	$	400,000
$250 million senior unsecured notes with an effective interest rate of 6.19%, less a discount of $0.4 million at both December 31, 2014 and 2013	249,636		249,572
$350 million senior secured credit facility with an effective interest rate of 2.17% at December 31, 2014 and 2013	129,375		138,750
Fixed rate collateralized mortgage plus a fair value adjustment of $1.2 million with an effective interest rate of 4.65% at December 31, 2014	10,667		—
Economic development loans with an effective rate interest rate of 3.00% at December 31, 2014 and 2013	3,536		3,360
Capital lease obligations due 2016 with an effective interest rate of 3.18% at December 31, 2014 and 2013	1,149		1,848
Other notes payable	68		29
Total debt	794,431		793,559
Less current portion	12,349		10,088
Total long-term debt	$	782,082	$	783,471

Schedule of Maturities of Long-term Debt

Scheduled principal maturities of debt, net of unamortized discounts and premiums, as of December 31, 2014 were as follows:

Year Ending	Senior Notes		Capital Lease			Revolving Credit Facility		Other Notes Payable		Total
	(in thousands)
2015	$	—	$	1,017		$	11,250	$	380	$	12,647
2016	—		594			118,125		409		119,128
2017	—		—			—		440		440
2018	—		—			—		474		474
2019	—		—			—		498		498
Thereafter	649,636		—			—		12,070		661,706
Total payments	649,636		1,611			129,375		14,271		794,893
Less: Amount representing estimated executory costs	—		(432		)	—		—		(432		)
Less: Amounts representing interest	—		(30		)	—		—		(30		)
Net principal payments	$	649,636	$	1,149		$	129,375	$	14,271	$	794,431