XML 74 R58.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Notes Payable (Details) | 1 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) instrument | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) derivative | Sep. 30, 2018 USD ($) derivative | Sep. 30, 2017 USD ($) derivative | Oct. 31, 2015 USD ($) derivative | May 31, 2014 USD ($) derivative | Apr. 30, 2013 USD ($) derivative
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | instrument |  |  | 0 |  |  |  |  |  |  |
Repayment of notes payable |  |  | $ 300,000,000 | $ 250,000,000 | $ 0 |  |  |  |  |
Payment of make-whole premium |  |  | 18,240,000 | 0 | $ 0 |  |  |  |  |
Long-term debt maturities for the next five years |  |  | 675,000,000 |  |  |  |  |  |  |
Loans Payable |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  | 26,932,000 | $ 22,682,000 |  |  |  |  |  |
2022 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | 325,000,000 |  |  |  |  |  |  |
Discount |  |  | 4,989,000 |  |  |  |  |  |  |
Net Price |  |  | $ 320,011,000 |  |  |  |  |  |  |
Stated Rate |  |  | 3.80% |  |  |  |  |  |  |
Effective Rate |  |  | 3.985% |  |  |  |  |  |  |
2023 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 350,000,000 |  |  |  |  |  |  |
Discount |  |  | 2,594,000 |  |  |  |  |  |  |
Net Price |  |  | $ 347,406,000 |  |  |  |  |  |  |
Stated Rate |  |  | 3.30% |  |  |  |  |  |  |
Effective Rate |  |  | 3.388% |  |  |  |  |  |  |
2023 Notes | Forward Starting Swaps |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | derivative |  |  |  |  |  |  |  |  |  | 4
Notional amount |  |  |  |  |  |  |  |  |  | $ 240,000,000
Liability amount from termination of hedge agreement |  |  |  |  |  |  |  |  |  | 3,156,000
Liability amount from termination of hedge agreement, comprehensive income |  |  |  |  |  |  |  |  |  | $ 3,141,000
2024 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 350,000,000 |  |  |  |  |  |  |
Discount |  |  | 707,000 |  |  |  |  |  |  |
Net Price |  |  | $ 349,293,000 |  |  |  |  |  |  |
Stated Rate |  |  | 3.90% |  |  |  |  |  |  |
Effective Rate |  |  | 3.924% |  |  |  |  |  |  |
2024 Notes | Forward Starting Swaps |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | derivative |  |  |  |  |  |  |  |  | 3 |
Notional amount |  |  |  |  |  |  |  |  | $ 225,000,000 |
Liability amount from termination of hedge agreement |  |  |  |  |  |  |  |  | $ 6,312,000 |
2025 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 400,000,000 |  |  |  |  |  |  |
Discount |  |  | 964,000 |  |  |  |  |  |  |
Net Price |  |  | $ 399,036,000 |  |  |  |  |  |  |
Stated Rate |  |  | 4.00% |  |  |  |  |  |  |
Effective Rate |  |  | 4.029% |  |  |  |  |  |  |
2025 Notes | Forward Starting Swaps |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | derivative |  |  |  |  |  |  |  | 4 |  |
Notional amount |  |  |  |  |  |  |  | $ 300,000,000 |  |
Liability amount from termination of hedge agreement |  |  |  |  |  |  |  | $ 13,369,000 |  |
2026 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 350,000,000 |  |  |  |  |  |  |
Discount |  |  | 3,860,000 |  |  |  |  |  |  |
Net Price |  |  | $ 346,140,000 |  |  |  |  |  |  |
Stated Rate |  |  | 3.60% |  |  |  |  |  |  |
Effective Rate |  |  | 3.733% |  |  |  |  |  |  |
2026 Notes | Forward Starting Swaps |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | derivative |  |  |  |  | 2 |  |  |  |  |
Notional amount |  |  |  |  | $ 180,000,000 |  |  |  |  |
Gain amount from termination of hedge agreement |  |  |  |  | $ 13,345,000 |  |  |  |  |
2027 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 400,000,000 |  |  |  |  |  |  |
Discount |  |  | 1,628,000 |  |  |  |  |  |  |
Net Price |  |  | $ 398,372,000 |  |  |  |  |  |  |
Stated Rate |  |  | 3.50% |  |  |  |  |  |  |
Effective Rate |  |  | 3.548% |  |  |  |  |  |  |
2027 Notes | Forward Starting Swaps |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | derivative |  |  |  |  |  |  | 2 |  |  |
Notional amount |  |  |  |  |  |  | $ 250,000,000 |  |  |
Liability amount from termination of hedge agreement |  |  |  |  |  |  | 7,690,000 |  |  |
Liability amount from termination of hedge agreement, comprehensive income |  |  |  |  |  |  | $ 7,688,000 |  |  |
2028 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 400,000,000 |  |  |  |  |  |  |
Discount |  |  | 2,848,000 |  |  |  |  |  |  |
Net Price |  |  | $ 397,152,000 |  |  |  |  |  |  |
Stated Rate |  |  | 4.30% |  |  |  |  |  |  |
Effective Rate |  |  | 4.388% |  |  |  |  |  |  |
2028 Notes | Forward Starting Swaps |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of derivative financial instruments outstanding | derivative |  |  |  |  |  | 2 |  |  |  |
Notional amount |  |  |  |  |  | $ 250,000,000 |  |  |  |
Gain amount from termination of hedge agreement |  |  |  |  |  | $ 4,080,000 |  |  |  |
2048 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal |  |  | $ 300,000,000 |  |  |  |  |  |  |
Discount |  |  | 4,239,000 |  |  |  |  |  |  |
Net Price |  |  | $ 295,761,000 |  |  |  |  |  |  |
Stated Rate |  |  | 4.80% |  |  |  |  |  |  |
Effective Rate |  |  | 4.89% |  |  |  |  |  |  |
2017 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Stated Rate |  | 6.875% |  |  |  |  |  |  |  |
Repayment of notes payable |  | $ 250,000,000 |  |  |  |  |  |  |  |
2021 Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Stated Rate | 5.50% |  |  |  |  |  |  |  |  |
Repayment of notes payable | $ 300,000,000 |  |  |  |  |  |  |  |  |
Redemption price percentage | 100.00% |  |  |  |  |  |  |  |  |
Payment of make-whole premium | $ 18,240,000 |  |  |  |  |  |  |  |  |

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