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Condensed Consolidating Financial Information (Cash Flows) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash flows from operating activities |  |  |  |
Net cash from operating activities | $ 422,551 | $ 300,339 | $ 326,674 |
Cash flows from investing activities |  |  |  |
Capital expenditures | (190,464) | (160,358) | (131,170) |
Net Investing Activity with Affiliates | 0 |  | 0 |
Proceeds from Equity Method Investment, Distribution | 0 | 0 | 0 |
Proceeds (Payments) from Investments in Development Agreement | (35,108) | 0 | 0 |
Payments to (Proceeds from) Combined Other Investing Activities | 706 |  |  |
Cash paid for acquisitions, net of cash received | (1,153) | (592,703) | 0 |
Other investing activities | 706 | 14,207 | 4,528 |
Net cash used in investing activities | (226,019) | (738,854) | (126,642) |
Cash flows from financing activities |  |  |  |
Borrowings under bank credit facility | 958,000 | 2,276,175 | 1,379,000 |
Payments under bank credit facility | (1,119,485) | (2,366,112) | (1,636,350) |
Debt financing costs, net | (3,430) | (42,220) | (14,004) |
Premium and Consent Fees Paid | 0 | (15,750) | (24,246) |
Net Financing Activity with Affiliates | 0 | (1,295) | 3,689 |
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries | 0 | 0 |  |
Share-based compensation activities, net | (7,711) | (1,295) | 3,689 |
Stock Repurchased During Period, Value | (31,927) |  |  |
Payments of Ordinary Dividends, Common Stock | (11,286) | 0 | 0 |
Proceeds from (Payments for) Other Financing Activities | (503) | 45 | 0 |
Net cash provided by (used in) financing activities | (215,336) | (99,247) | (199,724) |
Proceeds from Issuance of Senior Long-term Debt | 0 | 750,000 | 750,000 |
Payments on Retirements of Long-term Debt | 0 | 700,000 | 657,813 |
Cash flows from operating activities | (514) | (27,796) | 14,095 |
Cash flows from investing activities | 36,247 | 598,057 | 0 |
Cash flows from financing activities | 0 | 0 | 0 |
Net cash provided by discontinued operations | 35,733 | 570,261 | 14,095 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | 16,929 | 32,499 | 14,403 |
Proceeds from Issuance of Long-term Debt |  | 0 | 0 |
Proceeds from Contributions from Parent |  |  | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 227,279 | 210,350 | 177,851 | $ 163,448
Parent Company [Member] |  |  |  |
Cash flows from operating activities |  |  |  |
Net cash from operating activities | (82,632) | (86,502) | 102,080 |
Cash flows from investing activities |  |  |  |
Capital expenditures | (102,277) | (42,840) | (48,591) |
Net Investing Activity with Affiliates | 0 | 0 | 0 |
Proceeds from Equity Method Investment, Distribution | 10,867 | 9,150 | 11,200 |
Proceeds (Payments) from Investments in Development Agreement | 0 |  |  |
Payments to (Proceeds from) Combined Other Investing Activities | 0 |  |  |
Cash paid for acquisitions, net of cash received | (1,153) | (592,703) |  |
Other investing activities |  | 0 | 3,292 |
Net cash used in investing activities | (92,563) | (626,393) | (34,099) |
Cash flows from financing activities |  |  |  |
Borrowings under bank credit facility | 958,000 | 2,039,175 | 1,033,500 |
Payments under bank credit facility | (1,119,485) | (1,466,362) | (1,211,200) |
Debt financing costs, net | (3,430) | (42,220) | (14,004) |
Premium and Consent Fees Paid |  | (15,750) | (24,246) |
Net Financing Activity with Affiliates | 389,579 | (1,295) | 3,689 |
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries | 0 | 0 |  |
Share-based compensation activities, net | (7,711) |  |  |
Stock Repurchased During Period, Value | (31,927) |  |  |
Payments of Ordinary Dividends, Common Stock | (11,286) |  |  |
Proceeds from (Payments for) Other Financing Activities | (590) | 45 |  |
Net cash provided by (used in) financing activities | 174,330 | 714,105 | (67,981) |
Proceeds from Issuance of Senior Long-term Debt |  | 750,000 | 750,000 |
Payments on Retirements of Long-term Debt |  | 350,000 | 500,000 |
Cash flows from operating activities | 0 | 0 | 0 |
Cash flows from investing activities | 0 | 0 | 0 |
Cash flows from financing activities | 0 | 0 | 0 |
Net cash provided by discontinued operations | 0 | 0 | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | (865) | 1,210 | 0 |
Proceeds from Issuance of Long-term Debt |  | (199,398) | (105,720) |
Proceeds from Contributions from Parent |  |  | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 347 | 1,212 | 2 | 2
Guarantor Subsidiaries |  |  |  |
Cash flows from operating activities |  |  |  |
Net cash from operating activities | 519,608 | 380,803 | 237,010 |
Cash flows from investing activities |  |  |  |
Capital expenditures | (87,590) | (116,834) | (82,392) |
Net Investing Activity with Affiliates | (443,542) | 211,300 | (66,691) |
Proceeds from Equity Method Investment, Distribution | 0 | 0 | 0 |
Proceeds (Payments) from Investments in Development Agreement | 0 |  |  |
Payments to (Proceeds from) Combined Other Investing Activities | 706 |  |  |
Cash paid for acquisitions, net of cash received | 0 | 0 |  |
Other investing activities |  | 7,529 | 1,236 |
Net cash used in investing activities | (530,426) | 101,995 | (147,847) |
Cash flows from financing activities |  |  |  |
Borrowings under bank credit facility | 0 | 237,000 | 345,500 |
Payments under bank credit facility | 0 | (899,750) | (425,150) |
Debt financing costs, net | 0 | 0 | 0 |
Premium and Consent Fees Paid |  | 0 | 0 |
Net Financing Activity with Affiliates | 0 | 0 | 0 |
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries | (10,475) | (9,000) |  |
Share-based compensation activities, net | 0 |  |  |
Stock Repurchased During Period, Value | 0 |  |  |
Payments of Ordinary Dividends, Common Stock | 0 |  |  |
Proceeds from (Payments for) Other Financing Activities | 87 | 0 |  |
Net cash provided by (used in) financing activities | (10,562) | (1,021,750) | (90,753) |
Proceeds from Issuance of Senior Long-term Debt |  | 0 | 0 |
Payments on Retirements of Long-term Debt |  | 350,000 | 3 |
Cash flows from operating activities | (514) | (27,796) | 14,095 |
Cash flows from investing activities | 36,247 | 598,057 | 0 |
Cash flows from financing activities | 0 | 0 | 0 |
Net cash provided by discontinued operations | 35,733 | 570,261 | 14,095 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | 14,353 | 31,309 | 12,505 |
Proceeds from Issuance of Long-term Debt |  | 0 | 0 |
Proceeds from Contributions from Parent |  |  | (11,100) |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 213,963 | 199,610 | 168,301 | 155,796
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |
Cash flows from operating activities |  |  |  |
Net cash from operating activities | (15,628) | 7,234 | (12,131) |
Cash flows from investing activities |  |  |  |
Capital expenditures | (597) | (684) | (187) |
Net Investing Activity with Affiliates | 0 | 0 | 0 |
Proceeds from Equity Method Investment, Distribution | 0 | 0 | 0 |
Proceeds (Payments) from Investments in Development Agreement | (35,108) |  |  |
Payments to (Proceeds from) Combined Other Investing Activities | 0 |  |  |
Cash paid for acquisitions, net of cash received | 0 | 0 |  |
Other investing activities |  | 6,678 | 0 |
Net cash used in investing activities | (35,705) | 5,994 | (187) |
Cash flows from financing activities |  |  |  |
Borrowings under bank credit facility | 0 | 0 | 0 |
Payments under bank credit facility | 0 | 0 | 0 |
Debt financing costs, net | 0 | 0 | 0 |
Premium and Consent Fees Paid |  | 0 | 0 |
Net Financing Activity with Affiliates | 55,166 | 0 | 0 |
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries | (392) | (150) |  |
Share-based compensation activities, net | 0 |  |  |
Stock Repurchased During Period, Value | 0 |  |  |
Payments of Ordinary Dividends, Common Stock | 0 |  |  |
Proceeds from (Payments for) Other Financing Activities | 0 | 0 |  |
Net cash provided by (used in) financing activities | 54,774 | (13,027) | 14,214 |
Proceeds from Issuance of Senior Long-term Debt |  | 0 | 0 |
Payments on Retirements of Long-term Debt |  | 0 | 157,810 |
Cash flows from operating activities | 0 | 0 | 0 |
Cash flows from investing activities | 0 | 0 | 0 |
Cash flows from financing activities | 0 | 0 | 0 |
Net cash provided by discontinued operations | 0 | 0 | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | 3,441 | 201 | 1,896 |
Proceeds from Issuance of Long-term Debt |  | (12,877) | 172,124 |
Proceeds from Contributions from Parent |  |  | (100) |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 12,969 | 9,528 | 9,327 | 7,431
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |
Cash flows from operating activities |  |  |  |
Net cash from operating activities | 254 | 0 | (76) |
Cash flows from investing activities |  |  |  |
Capital expenditures | 0 | 0 | 0 |
Net Investing Activity with Affiliates | 0 | 0 | 0 |
Proceeds from Equity Method Investment, Distribution | 0 | 0 | 0 |
Proceeds (Payments) from Investments in Development Agreement | 0 |  |  |
Payments to (Proceeds from) Combined Other Investing Activities | 0 |  |  |
Cash paid for acquisitions, net of cash received | 0 | 0 |  |
Other investing activities |  | 0 | 0 |
Net cash used in investing activities | 0 | 0 | 0 |
Cash flows from financing activities |  |  |  |
Borrowings under bank credit facility | 0 | 0 | 0 |
Payments under bank credit facility | 0 | 0 | 0 |
Debt financing costs, net | 0 | 0 | 0 |
Premium and Consent Fees Paid |  | 0 | 0 |
Net Financing Activity with Affiliates | (254) | 0 | 0 |
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries | 0 | 0 |  |
Share-based compensation activities, net | 0 |  |  |
Stock Repurchased During Period, Value | 0 |  |  |
Payments of Ordinary Dividends, Common Stock | 0 |  |  |
Proceeds from (Payments for) Other Financing Activities | 0 | 0 |  |
Net cash provided by (used in) financing activities | (254) | (221) | 78 |
Proceeds from Issuance of Senior Long-term Debt |  | 0 | 0 |
Payments on Retirements of Long-term Debt |  | 0 | 0 |
Cash flows from operating activities | 0 | 0 | 0 |
Cash flows from investing activities | 0 | 0 | 0 |
Cash flows from financing activities | 0 | 0 | 0 |
Net cash provided by discontinued operations | 0 | 0 | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | 0 | (221) | 2 |
Proceeds from Issuance of Long-term Debt |  | (221) | 78 |
Proceeds from Contributions from Parent |  |  | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | 0 | 0 | 221 | 219
Eliminations [Member] |  |  |  |
Cash flows from operating activities |  |  |  |
Net cash from operating activities | 949 | (1,196) | (209) |
Cash flows from investing activities |  |  |  |
Capital expenditures | 0 | 0 | 0 |
Net Investing Activity with Affiliates | 443,542 | (211,300) | 66,691 |
Proceeds from Equity Method Investment, Distribution | (10,867) | (9,150) | (11,200) |
Proceeds (Payments) from Investments in Development Agreement | 0 |  |  |
Payments to (Proceeds from) Combined Other Investing Activities | 0 |  |  |
Cash paid for acquisitions, net of cash received | 0 | 0 |  |
Other investing activities |  | 0 | 0 |
Net cash used in investing activities | 432,675 | (220,450) | 55,491 |
Cash flows from financing activities |  |  |  |
Borrowings under bank credit facility | 0 | 0 | 0 |
Payments under bank credit facility | 0 | 0 | 0 |
Debt financing costs, net | 0 | 0 | 0 |
Premium and Consent Fees Paid |  | 0 | 0 |
Net Financing Activity with Affiliates | (444,491) | 0 | 0 |
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries | 10,867 | 9,150 |  |
Share-based compensation activities, net | 0 |  |  |
Stock Repurchased During Period, Value | 0 |  |  |
Payments of Ordinary Dividends, Common Stock | 0 |  |  |
Proceeds from (Payments for) Other Financing Activities | 0 |  |  |
Net cash provided by (used in) financing activities | (433,624) | 221,646 | (55,282) |
Proceeds from Issuance of Senior Long-term Debt |  | 0 | 0 |
Payments on Retirements of Long-term Debt |  |  | 0 |
Cash flows from operating activities | 0 | 0 | 0 |
Cash flows from investing activities | 0 | 0 | 0 |
Cash flows from financing activities | 0 | 0 | 0 |
Net cash provided by discontinued operations | 0 | 0 | 0 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | 0 | 0 | 0 |
Proceeds from Issuance of Long-term Debt |  | 212,496 | (66,482) |
Proceeds from Contributions from Parent |  |  | 11,200 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | $ 0 | 0 | $ 0 | $ 0
Consolidation, Eliminations [Member] |  |  |  |
Cash flows from financing activities |  |  |  |
Proceeds from (Payments for) Other Financing Activities |  | 0 |  |
Payments on Retirements of Long-term Debt |  | $ 0 |  |

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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow from parent as a source of financing that is recorded as additional paid in capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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