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Earnings per Share Earnings per Share (Textuals) (Details) - USD ($) $ / shares in Units, $ in Thousands | 2 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 01, 2018 | Jun. 30, 2013 | Sep. 15, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Oct. 16, 2017 | Apr. 10, 2013 | Mar. 15, 2007
Debt Conversion [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  |  |  | 2,000,000 |  |  |  | 2,000,000 |
Preferred shares redeemed |  |  |  |  |  |  | 2,000 | 2,000 |
Depositary shares redeemed |  |  |  |  |  |  | 2,000,000 |  |
Preferred Stock, Redemption Price Per Share |  |  |  |  |  | $ 609.375 |  |  |
Preferred dividends |  |  |  | $ 0 | $ 0 | $ 3,656 |  |  |
Preferred Stock, Par or Stated Value Per Share |  |  |  | $ 0.01 |  |  |  |  |
Depositary shares issued |  |  |  |  |  |  |  |  | 4,000,000
Redemption of preferred shares |  | $ 50,400 |  |  |  | $ 50,420 |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  |  | 9.75% |  |  |
Preferred Stock, Shares Issued |  |  |  |  |  |  |  |  | 4,000
2017 Convertible Senior Notes [Member] |  |  |  |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |  |  |  |
Convertible Subordinated Debt |  |  | $ 57,500 |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.25% |  |  |  |  |  |
Stock Issued During Period, Shares, Other |  |  | 2,400,000 |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price |  |  | $ 23.80 |  |  |  |  |  |
2018 Convertible Senior Notes [Member] |  |  |  |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |  |  |  |
Convertible Subordinated Debt | $ 86,300 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.00% |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ 32.31 |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount | $ 20,300 |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | 629,000 |  |  |  |  |  |  |  |
Repayments of Convertible Debt | $ 65,900 |  |  |  |  |  |  |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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