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Guarantor Subsidiaries (Consolidating Statement of Changes In Equity) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Jun. 30, 2020 | Jun. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | $ 746,800 | $ 803,000 | $ 797,800 | $ 807,300 |  | $ 803,000 | $ 807,300
Issuance of treasury stock |  | (500) | 0 | 0 |  |  |
Purchase of treasury stock | 0 | (140,600) | (16,800) | (13,300) |  |  |
Amounts related to share-based compensation | 0 | (5,600) | (200) | (4,100) |  |  |
Share-based compensation expense | 2,800 | 2,800 | 2,800 | 2,600 |  |  |
Net income | 168,900 | 89,300 | 32,700 | 5,300 |  | 258,200 | 38,000
Ending balance | 918,000 | 746,800 | 816,300 | 797,800 |  | 918,000 | 816,300
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 1,100 |  |  |  | 1,100 |
Common Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 500 | 500 | 500 | 500 |  | 500 | 500
Issuance of common stock | 0 | 0 | 0 | 0 |  |  |
Ending balance | 500 | 500 | 500 | 500 |  | 500 | 500
Treasury Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (1,235,200) | (1,099,800) | (948,000) | (940,300) |  | (1,099,800) | (940,300)
Issuance of treasury stock | 0 | 5,200 | 100 | 5,600 |  |  |
Purchase of treasury stock | 0 | (140,600) | (16,800) | (13,300) |  |  |
Ending balance | (1,235,200) | (1,235,200) | (964,700) | (948,000) |  | (1,235,200) | (964,700)
APIC |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 530,200 | 538,700 | 531,900 | 539,000 |  | 538,700 | 539,000
Issuance of treasury stock |  | (5,700) | (100) | (5,600) |  |  |
Amounts related to share-based compensation | 0 | (5,600) | (200) | (4,100) |  |  |
Share-based compensation expense | 2,800 | 2,800 | 2,800 | 2,600 |  |  |
Ending balance | 533,000 | 530,200 | 534,400 | 531,900 |  | 533,000 | 534,400
Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 1,453,300 | 1,362,900 | 1,213,400 | 1,208,100 |  | 1,362,900 | 1,208,100
Net income | 168,900 | 89,300 | 32,700 | 5,300 |  |  |
Ending balance | 1,622,200 | 1,453,300 | 1,246,100 | 1,213,400 |  | 1,622,200 | 1,246,100
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 1,100 |  |  |  | 1,100 |
AOCI |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (2,000) | 700 | 0 | 0 |  | 700 | 0
Other comprehensive income (loss) |  | (2,700) | 0 | 0 |  |  |
Net income | (500) |  |  |  |  |  |
Ending balance | (2,500) | (2,000) | 0 | 0 |  | (2,500) | 0
Eliminations |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | (2,735,700) |  |  |  | (2,735,700) |
Net income | (168,700) |  | (32,600) |  |  | (257,900) | (37,700)
Ending balance | (2,993,600) |  |  |  |  | (2,993,600) |
Eliminations | Common Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (100) | (100) | (100) | (100) |  | (100) | (100)
Ending balance | (100) | (100) | (100) | (100) |  | (100) | (100)
Eliminations | Treasury Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Eliminations | APIC |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (1,368,400) | (1,368,400) | (1,368,400) | (1,368,400) |  | (1,368,400) | (1,368,400)
Ending balance | (1,368,400) | (1,368,400) | (1,368,400) | (1,368,400) |  | (1,368,400) | (1,368,400)
Eliminations | Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (1,456,400) | (1,367,200) | (1,218,000) | (1,212,900) |  | (1,367,200) | (1,212,900)
Net income | (168,700) | (89,200) | (32,600) | (5,100) |  |  |
Ending balance | (1,625,100) | (1,456,400) | (1,250,600) | (1,218,000) |  | (1,625,100) | (1,250,600)
Eliminations | AOCI |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Parent Company | Reportable Legal Entities |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 2,591,900 |  |  |  | 2,591,900 |
Net income | 168,900 |  | 32,700 |  |  | 258,200 | 38,000
Ending balance | 2,709,000 |  |  |  |  | 2,709,000 |
Parent Company | Reportable Legal Entities | Common Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 500 | 500 | 500 | 500 |  | 500 | 500
Ending balance | 500 | 500 | 500 | 500 |  | 500 | 500
Parent Company | Reportable Legal Entities | Treasury Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (1,235,200) | (1,099,800) | (948,000) | (940,300) |  | (1,099,800) | (940,300)
Issuance of treasury stock | 0 | 5,200 | 100 | 5,600 |  |  |
Purchase of treasury stock | 0 | (140,600) | (16,800) | (13,300) |  |  |
Ending balance | (1,235,200) | (1,235,200) | (964,700) | (948,000) |  | (1,235,200) | (964,700)
Parent Company | Reportable Legal Entities | APIC |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 1,183,100 | 1,188,800 | 1,189,500 | 1,195,100 |  | 1,188,800 | 1,195,100
Issuance of treasury stock |  | (5,700) | (100) | (5,600) |  |  |
Ending balance | 1,183,100 | 1,183,100 | 1,189,400 | 1,189,500 |  | 1,183,100 | 1,189,400
Parent Company | Reportable Legal Entities | Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 2,591,700 | 2,502,400 | 2,187,100 | 2,181,800 |  | 2,502,400 | 2,181,800
Net income | 168,900 | 89,300 | 32,700 | 5,300 |  |  |
Ending balance | 2,760,600 | 2,591,700 | 2,219,800 | 2,187,100 |  | 2,760,600 | 2,219,800
Parent Company | Reportable Legal Entities | AOCI |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Issuer | Reportable Legal Entities |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 741,400 |  |  |  | 741,400 |
Net income | 168,900 |  | 32,700 |  |  | 258,200 | 38,000
Ending balance | 997,500 |  |  |  |  | 997,500 |
Issuer | Reportable Legal Entities | Common Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Issuer | Reportable Legal Entities | Treasury Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Issuer | Reportable Legal Entities | APIC |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 576,000 | 578,800 | 571,300 | 572,800 |  | 578,800 | 572,800
Amounts related to share-based compensation |  | (5,600) | (200) | (4,100) |  |  |
Share-based compensation expense | 2,800 | 2,800 | 2,800 | 2,600 |  |  |
Ending balance | 578,800 | 576,000 | 573,900 | 571,300 |  | 578,800 | 573,900
Issuer | Reportable Legal Entities | Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 252,300 | 161,900 | 178,200 | 172,900 |  | 161,900 | 172,900
Net income | 168,900 | 89,300 | 32,700 | 5,300 |  |  |
Ending balance | 421,200 | 252,300 | 210,900 | 178,200 |  | 421,200 | 210,900
Issuer | Reportable Legal Entities | Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 1,100 |  |  |  | 1,100 |
Issuer | Reportable Legal Entities | AOCI |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (2,000) | 700 | 0 | 0 |  | 700 | 0
Other comprehensive income (loss) |  | (2,700) |  |  |  |  |
Net income | (500) |  |  |  |  |  |
Ending balance | (2,500) | (2,000) | 0 | 0 |  | (2,500) | 0
Guarantor Subsidiaries | Reportable Legal Entities |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 51,100 |  |  |  | 51,100 |
Net income | (200) |  | (100) |  |  | (300) | (300)
Ending balance | 50,800 |  |  |  |  | 50,800 |
Guarantor Subsidiaries | Reportable Legal Entities | Common Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 100 | 100 | 100 | 100 |  | 100 | 100
Ending balance | 100 | 100 | 100 | 100 |  | 100 | 100
Guarantor Subsidiaries | Reportable Legal Entities | Treasury Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Guarantor Subsidiaries | Reportable Legal Entities | APIC |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 52,000 | 52,000 | 52,000 | 52,000 |  | 52,000 | 52,000
Ending balance | 52,000 | 52,000 | 52,000 | 52,000 |  | 52,000 | 52,000
Guarantor Subsidiaries | Reportable Legal Entities | Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | (1,100) | (1,000) | (700) | (500) |  | (1,000) | (500)
Net income | (200) | (100) | (100) | (200) |  |  |
Ending balance | (1,300) | (1,100) | (800) | (700) |  | (1,300) | (800)
Guarantor Subsidiaries | Reportable Legal Entities | AOCI |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Non-Guarantor Subsidiaries | Reportable Legal Entities |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | 154,300 |  |  |  | 154,300 |
Net income | 0 |  | 0 |  |  | 0 | 0
Ending balance | 154,300 |  |  |  |  | 154,300 |
Non-Guarantor Subsidiaries | Reportable Legal Entities | Common Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Non-Guarantor Subsidiaries | Reportable Legal Entities | Treasury Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | 0 | 0 | 0 | 0 |  | 0 | 0
Non-Guarantor Subsidiaries | Reportable Legal Entities | APIC |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 87,500 | 87,500 | 87,500 | 87,500 |  | 87,500 | 87,500
Ending balance | 87,500 | 87,500 | 87,500 | 87,500 |  | 87,500 | 87,500
Non-Guarantor Subsidiaries | Reportable Legal Entities | Retained Earnings |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 66,800 | 66,800 | 66,800 | 66,800 |  | 66,800 | 66,800
Net income |  |  |  | 0 | $ 0 |  |
Ending balance | 66,800 | 66,800 | 66,800 | 66,800 |  | 66,800 | 66,800
Non-Guarantor Subsidiaries | Reportable Legal Entities | AOCI |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |  | 0 | 0
Ending balance | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0 | $ 0

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