Debt and Other Long-Term Liabilities (Tables)

3 Months Ended

Mar. 31, 2016

Long-term Debt, Unclassified [Abstract]

Schedule of Debt and Other Long Term Liabilities

	Debt															Other Liabilities							Total
	Senior Notes						Credit Facility						Total Debt			Capital Lease Obligations			Asset retirement obligations		Other long-term liabilities
Dollars in thousands	Senior Unsecured Notes due 2019			Senior Unsecured Notes due 2021			Term Loans			Revolving Line of Credit
As of March 31, 2016:
Principal	$	320,614		$	231,233		$	134,063		$	120,000		$	805,910
Unamortized discount and deferred financing fees(1)	(3,187		)	(3,435		)	(242		)	(2,134		)	(8,998		)
Total	317,427			227,798			133,821			117,866			796,912			$	6,011		$	9,416	$	19,540	$	831,879
Less: current portion	—			—			(14,062		)	—			(14,062		)	(3,850		)	—		—		(17,912		)
Total long-term portion	$	317,427		$	227,798		$	119,759		$	117,866		$	782,850		$	2,161		$	9,416	$	19,540	$	813,967

	Debt															Other Liabilities							Total
	Senior Notes						Credit Facility						Total Debt			Capital Lease Obligations			Asset retirement obligations		Other long-term liabilities
Dollars in thousands	Senior Unsecured Notes due 2019			Senior Unsecured Notes due 2021			Term Loans			Revolving Line of Credit
As of December 31, 2015:
Principal	$	350,000		$	258,908		$	136,875		$	140,500		$	886,283
Unamortized discount and deferred financing fees(1)	(3,770		)	(4,083		)	(260		)	(2,300		)	(10,413		)
Total	346,230			254,825			136,615			138,200			875,870			$	5,889		$	9,412	$	19,477	$	910,648
Less: current portion	—			—			(13,125		)	—			(13,125		)	(4,006		)	—		—		(17,131		)
Total long-term portion	$	346,230		$	254,825		$	123,490		$	138,200		$	862,745		$	1,883		$	9,412	$	19,477	$	893,517

(1) As described in Note 1: Basis of Presentation and Principles of Consolidation, we adopted ASU 2015-03 and 2015-15 in the first quarter of 2016 and have applied the guidance to our Senior Notes and Credit Facility. Under this guidance, we are now presenting unamortized deferred financing fees as a direct deduction from the associated debt liability. Historically, unamortized deferred financing fees were included in other non-current assets. This adoption resulted in the reclassification of $3.8 million of unamortized deferred financing fees as of December 31, 2015, from other non-current assets to long-term debt in our Consolidated Balance Sheets. Deferred financing fees are amortized on a straight line basis over the life of the related loan.

Interest Expense Disclosure

Interest Expense

Dollars in thousands	Three Months Ended
	March 31,
	2016			2015
Cash interest expense	$	10,654		$	11,395
Amortization of debt discount and deferred financing fees	638			693
Total cash and non-cash interest expense	11,292			12,088
Gain from early extinguishment of debt	(11,028		)	—
Total interest expense	$	264		$	12,088

Schedule of Maturities of Long-term Debt

equired principal amortization payments under the Term Loan are as follows:

Dollars in thousands	Repayment Amount
Remainder of 2016	$	10,313
2017	15,000
2018	18,750
2019	90,000
Total	$	134,063