Senior Convertible Notes (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Schedule of interest activity

A summary of quarterly activity is listed below (dollars in thousands):

Interest payable on Senior Convertible Debenture at 1/1/2015	$	2,500
Accrued interest expense during the 3 months ended March 31, 2015	3,750
Interest Payable on Senior Convertible Debenture at March 31, 2015	6,250
Accrued interest expense during the 3 months ended June 30, 2015	3,388
Interest Payment on Senior Convertible Debenture at May 1, 2015	(7,416		)
Interest payable on Senior Convertible Debenture as of June 30, 2015	2,222
Accrued interest expense during the 3 months ended September 30, 2015	2,747
Interest payable on Senior Convertible Debenture as of September 30, 2015	4,969
Interest payment at November 1, 2015	(5,963		)
Accrued interest expense during the 3 months ended December 31, 2015	2,982
Interest payable as of December 31, 2015	1,988
Accrued interest expense during the 3 months ended March 31, 2016	486
Interest payable as of March 31, 2016	$	2,474

Schedule of activity and balances associated with the Notes and related deferred transaction costs

A summary of quarterly activity and balances associated with the Notes and related deferred transaction costs is presented below ($ in thousands):

	Notes Balance			Transactions Costs			Notes, net of Transaction Costs
Balance at issuance November 1, 2014	$	200,000		$	12,747		$	187,253
Less: amortization two months ended December 31, 2014	—			(411		)	411
Balance December 31, 2014	200,000			12,336			187,664
Less: amortization three months ended March 31, 2015	—			(617		)	617
Balance March 31, 2015	200,000			11,719			188,281
Less: amortization three months ended June 30, 2015 (1)	—			(1,899		)	1,899
Conversions	(22,213		)	—			(22,213		)
Balance June 30, 2015	177,787			9,820			167,967
Less: amortization three months ended September 30, 2015 (1)	—			(1,544		)	1,544
Conversions	(18,776		)	—			(18,776		)
Balance, September 30, 2015	159,011			8,276			150,735
Less: amortization three months ended December 31, 2015	—			(506		)	506
Balance December 31, 2015	159,011			7,770			151,241
Less: amortization three months ended March 31, 2016 (1)	—			(4,153		)	4,153
Conversions	(79,829		)	—			(79,829		)
Balance, March 31, 2016	$	79,182		$	3,617		$	75,565

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(1) Includes accelerated amortization of deferred financing costs attributable to conversions and exchanges