Note 12 — Debt

As of December 31, 2016 and 2015, debt consists of a mortgage note payable with a carrying value of $1.2 million and $1.5 million, respectively. See Note 20, “Subsequent Events,” for information concerning the Company’s issuance of $345.0 million in aggregate principal amount of 2.7% convertible senior unsecured notes due 2023 in January 2017. The mortgage note payable is secured by certain land and buildings with a carrying value of $3.3 million at December 31, 2016 and 2015. The annual interest rate on the mortgage is 7.91%, and the final payment is due on January 1, 2020. The Company determined the mortgage is a Level 3 liability in the fair-value hierarchy and estimated its fair value as $1.2 million and $1.6 million at December 31, 2016 and 2015, respectively, using a discounted cash flow model. Payments due under the note are as follows:

	Total
	(in thousands)
2017	368
2018	398
2019	428

Total	1,194
Less current portion	368

Total (less current maturities)	$	826

See Note 20, “Subsequent Events,” for additional information regarding the Company’s Convertible Notes.