Common Stocks [Member] Common Stock [Member] Common stock member. Revolving Credit Facilities [Member] Revolving Credit Facilities [Member] Convertible Senior Notes Due Two Thousand And Nineteen [Member] Convertible Senior Notes due 2019 [Member] Convertible Senior Notes Due Two Thousand And Twenty Two [Member] Convertible Senior Notes due 2022 [Member] Two Thousand Twenty Three Notes [Member] 2023 Notes [Member] Two Thousand Twenty Four Notes [Member] 2024 Notes [Member] Two Thousand Twenty Six Notes [Member] 2026 Notes [Member] Two Thousand Twenty Eight Notes [Member] 2028 Notes [Member] Risks Related To Offerings Pursuant To This Prospectus [Member] Risks related to offerings pursuant to this prospectus member.