Debt (Tables)

3 Months Ended

Sep. 30, 2015

Debt

Schedule of carrying value of Convertible Notes

The following table presents the carrying values of all Convertible Notes as of September 30, 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	(4,866		)	—		(5,361		)	(10,227		)
Net carrying amount	$	95,134		$	44,654	$	64,985		$	204,773

Summary of interest expense related to the Convertible Notes

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

	Three months ended September 30,
	2015		2014
Interest expense related to contractual interest coupon	$	1,945	$	1,943
Interest expense related to amortization of debt discount	1,920		1,759
Interest expense related to amortization of debt issuance costs	403		363
	$	4,268	$	4,065