As of

(in thousands)

September 30, 2020

December 31, 2019

Credit Facility:

Revolving credit agreement

$

—

$

—

Convertible Debt:

0.75% convertible notes, unsecured, due 2049

448,344

436,965

1.375% Senior Notes, due 2026

703,200

673,440

Other obligations

942

6,215

Total debt obligations

1,152,486

1,116,620

Unamortized debt issuance costs

(18,976

)

(19,592

)

Carrying value of debt

1,133,510

1,097,028

Short-term debt obligations and current maturities of long-term debt obligations

(884

)

(6,089

)

Long-term debt obligations

$

1,132,626

$

1,090,939