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Preferred Shares | 12 Months Ended
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Dec. 31, 2017
Preferred Shares [Abstract] |
Preferred Stock [Text Block] | Preferred Shares The Company’s Articles of Incorporation authorize the issuance of up to 2,000,000 preferred shares, par value $.01 per share. On March 15, 2007, the Company issued 4,000,000 depositary shares, each representing 1/1000 th of a 9.75% Series A Preferred Share of the Company (the “Series A Preferred Shares”), or 4,000 Series A Preferred Shares in the aggregate. On April 10, 2013, the Company redeemed 2,000 of its Series A Preferred Shares (and the 2,000,000 related depositary shares) for an aggregate redemption price of approximately $50.4 million in cash. On October 16, 2017, the Company redeemed the remaining 2,000 outstanding Series A Preferred Shares (and the 2,000,000 related depositary shares) for an aggregate redemption price of approximately $50.4 million in cash. The Company declared and paid a quarterly dividend of $609.375 per share on its Series A Preferred Shares in the first three quarters of 2017, and in each quarter of both 2016 and 2015 and paid aggregate dividend payments on the Series A Preferred Shares of $3.7 million in 2017 and $4.9 million in both 2016 and 2015.

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- Definition Preferred Shares [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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