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Long-term Debt (Summary of Long-Term Debt) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Jul. 28, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross | $ 3,150,000 |  | $ 2,858,000
Unamortized discount | (34,898) |  | (23,675)
Unamortized deferred financing costs | (17,752) | $ (9,400) | (15,062)
Long-term debt, net | 3,097,350 |  | 2,819,263
Current portion of long-term debt | 0 |  | 222,000
Long-term debt | 3,097,350 |  | 2,597,263
Term-A Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, net | 736,500 |  | 1,245,175
4.75% Senior Notes Due 2025 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, net | $ 784,334 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.75% |  |
5.00% Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, net | $ 983,510 |  | $ 981,949
Debt Instrument, Interest Rate, Stated Percentage | 5.00% |  | 5.00%
4.75% Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, net | $ 593,006 |  | $ 592,139
Debt Instrument, Interest Rate, Stated Percentage | 4.75% |  | 4.75%
Senior Notes [Member] | 4.75% Senior Notes Due 2025 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross | $ 800,000 |  | $ 0
Senior Notes [Member] | 5.00% Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross | 1,000,000 |  | 1,000,000
Senior Notes [Member] | 4.75% Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross | 600,000 |  | 600,000
Secured Debt [Member] | Term-A Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross | $ 750,000 | $ 750,000 | $ 1,258,000

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 + Details
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