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Long-Term Obligations 6.75% Senior Notes Due 2025 (Details) - Senior Notes [Member] - Senior 2025 Notes [Member] - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | May 23, 2017
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount |  | $ 250.0
Debt Instrument, Interest Rate, Stated Percentage |  | 6.75%
Principal outstanding | $ 250.0 |
Debt Issuance Costs, Net | 5.7 |
Debt Instrument, Unamortized Discount | $ 1.9 |
Debt Instrument, Redemption, Period One [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 35.00% |
Debt Instrument, Redemption Price, Percentage | 106.75% |
Debt Instrument, Redemption, Period Two [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Redemption Price, Percentage | 105.063% |
Debt Instrument, Redemption, Period Three [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Redemption Price, Percentage | 103.375% |
Debt Instrument, Redemption, Period Four [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Redemption Price, Percentage | 101.688% |
Debt Instrument, Redemption, Period Five [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Redemption Price, Percentage | 100.00% |

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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 Face (par) amount of debt instrument at time of issuance. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + 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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