Convertible Senior Notes (Tables)

12 Months Ended

Dec. 31, 2015

A summary of quarterly interest activity related to the loan is listed below (dollars in thousands):

Interest payable at September 30, 2014	$	—
Accrued interest expense from November 3, 2014 to December 31, 2014	2,500

Interest payable at January 1, 2015	2,500
Accrued interest expense during the 3 months ended March 31, 2015	3,750

Interest payable at March 31, 2015	6,250
Interest payment at May 1, 2015	(7,416		)
Accrued interest expense during the 3 months ended June 30, 2015	3,388

Interest payable as of June 30, 2015	2,222
Accrued interest expense during the 3 months ended September 30, 2015	2,747

Interest payable 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

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

							Notes, net of
	Notes			Transaction			Transaction
	Balance			Costs			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

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