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Debt Senior Notes (Details) $ / shares in Units, shares in Millions | 12 Months Ended |
--- | --- | ---
Jan. 15, 2021 | Jan. 14, 2020 | Jan. 14, 2019 | Dec. 31, 2015 USD ($) $ / shares shares | Dec. 31, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Senior notes |  |  |  | $ 294,727,000 | $ 226,099,000
Preferred Stock, Dividend Rate, Percentage |  |  |  | 9.75% |
Restricted Payments Basket |  |  |  | $ 128,550,000 |
2018 Convertible Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Convertible senior subordinated notes |  |  |  | $ 86,250,000 |
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 |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.00% |
2017 Convertible Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Convertible senior subordinated notes |  |  |  | $ 57,500,000 |
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 |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.25% |
2018 Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Early Repayment of Senior Debt |  |  |  | $ 237,500,000 |
Loss on early extinguishment of debt, including transaction costs |  |  |  | 5,000,000 |
Interest Paid |  |  |  | 2,500,000 |
Amortization of Debt Discount (Premium) |  |  |  | 1,100,000 |
Write off of Deferred Debt Issuance Cost |  |  |  | $ 1,800,000 |
2021 Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.75% |
Senior notes |  |  |  | $ 300,000,000 |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 100.00% | 101.688% | 103.375% |  |
Face value [Member] | 2018 Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Extinguishment of Debt, Amount |  |  |  | 230,000,000 |
Face value [Member] | 2021 Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Senior notes |  |  |  | $ 300,000,000 |
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 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% |
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% |
Base of restricted payments basket income calculation [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Restrictions on payment of dividends |  |  |  | $ 125,000,000 |

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