Debt (Tables)

9 Months Ended

Mar. 31, 2015

Debt

Schedule of carrying value of Convertible Notes

The following table presents the carrying values of all Convertible Notes as of March 31, 2015 (in thousands):

	3.75% Notes			3.50% Notes		3.50% Series A Notes			TOTAL
Carrying amount of the equity conversion component	$	23,189		$	—	$	7,844		$	31,033
Principal amount of the Convertible Notes	$	100,000		$	44,654	$	70,346		$	215,000
Unamortized debt discount	(7,610		)	—		(6,401		)	(14,011		)
Net carrying amount	$	92,390		$	44,654	$	63,945		$	200,989

Summary of interest expense related to the Convertible Notes

A summary of interest expense on all Convertible Notes is as follows (in thousands):

	Three months ended March 31,				Nine months ended March 31,
	2015		2014		2015		2014
Interest expense related to contractual interest coupon	$	1,944	$	1,943	$	5,832	$	5,831
Interest expense related to amortization of debt discount	1,837		1,205		5,377		3,519
Interest expense related to amortization of debt issuance costs	383		361		1,114		1,053
	$	4,164	$	3,509	$	12,323	$	10,403