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Debt Senior Notes (Details) $ / shares in Units, shares in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 USD ($) $ / shares shares | Jan. 15, 2021 | Jan. 14, 2020 | Jan. 14, 2019 | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Senior notes due 2021 - net | $ 294,904,000 |  |  |  | $ 294,727,000
Preferred Stock, Dividend Rate, Percentage | 9.75% |  |  |  |
Restricted Payments Basket | $ 130,000,000 |  |  |  | $ 128,500,000
2021 Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior notes due 2021 - net | $ 300,000,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.75% |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  | 100.00% | 101.688% | 103.375% |
2017 Convertible Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Convertible senior subordinated notes | $ 57,500,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.25% |  |  |  |
Debt Instrument, Convertible, Conversion Ratio | 42.0159 |  |  |  |
Debt Instrument Convertible Principal Amount Used In Conversion Rate Calculation | $ 1,000 |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ / shares | $ 23.80 |  |  |  |
Stock Issued During Period, Shares, Other | shares | 2.4 |  |  |  |
2018 Convertible Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Convertible senior subordinated notes | $ 86,250,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.00% |  |  |  |
Debt Instrument, Convertible, Conversion Ratio | 30.9478 |  |  |  |
Debt Instrument Convertible Principal Amount Used In Conversion Rate Calculation | $ 1,000 |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ / shares | $ 32.31 |  |  |  |
Stock Issued During Period, Shares, Other | shares | 2.7 |  |  |  |
Base of restricted payments basket income calculation [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other Restrictions on Payment of Dividends | $ 125,000,000 |  |  |  |
Percentage of our aggregate consolidated net income added to base amount of calculation [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percent restrictions on payment of dividends | 50.00% |  |  |  |
Percentage of our aggregate consolidated net income subtracted from base amount of calculation [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percent restrictions on payment of dividends | 100.00% |  |  |  |
Percentage of net cash proceeds from sale of qualified equity interests added to base and income/loss amount in calculation [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percent restrictions on payment of dividends | 100.00% |  |  |  |

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- Definition Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX210.5-02.22)) -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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 20, 22 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: 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(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: 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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