Information related to availability on our Credit Agreement is as follows:



	March 31,
	2017		2016
Available borrowings	$	98,320	$	98,335
Outstanding letters of credit	$	1,664	$	1,664

The following table provides additional information related to our 1.75% Convertible Notes:



	March 31,
	2017		2016
Additional paid-in capital	$	—	$	51,180
Principal amount of 1.75% Convertible Notes	$	—	$	250,000
Unamortized discount of the liability component	—		8,014
Carrying amount of debt issuance costs	—		657
Net carrying amount of 1.75% Convertible Notes	$	—	$	241,329

The following table provides the components of interest expense related to our 1.75% Convertible Notes:



	Fiscal Year Ended March 31,
	2017		2016		2015
Cash interest expense (coupon interest expense)	$	2,898	$	4,375	$	4,375
Non-cash amortization of discount on 1.75% Convertible Notes	8,014		11,372		10,639
Amortization of debt issuance costs	657		1,005		1,054
Total interest expense related to 1.75% Convertible Notes	$	11,569	$	16,752	$	16,068

The following table provides additional information related to our 1.00% Convertible Notes:



	March 31,
	2017		2016
Additional paid-in capital	$	35,784	$	35,784
Principal amount of 1.00% Convertible Notes	$	268,149	$	287,500
Unamortized discount of the liability component	15,751		29,972
Carrying amount of debt issuance costs	469		922
Net carrying amount of 1.00% Convertible Notes	$	251,929	$	256,606

The following table provides the components of interest expense related to our 1.00% Convertible Notes:



	Fiscal Year Ended March 31,
	2017		2016		2015
Cash interest expense (coupon interest expense)	$	2,784	$	2,875	$	2,875
Non-cash amortization of discount on 1.00% Convertible Notes	14,221		12,085		11,387
Amortization of debt issuance costs	453		443		466
Total interest expense related to 1.00% Convertible Notes	$	17,458	$	15,403	$	14,728