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Dividends, Textual (Details) ¥ / shares in Units, $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 $ / shares | Dec. 31, 2019 JPY (¥) | Sep. 30, 2019 $ / shares | Sep. 30, 2019 JPY (¥) | Jun. 30, 2019 $ / shares | Jun. 30, 2019 JPY (¥) | Mar. 31, 2019 USD ($) $ / shares | Mar. 31, 2019 JPY (¥) ¥ / shares | Dec. 31, 2019 USD ($) dividend $ / shares | Dec. 31, 2018 USD ($) dividend $ / shares | Dec. 31, 2018 JPY (¥) dividend ¥ / shares
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of quarters, dividend payments | dividend |  |  |  |  |  |  |  |  | 4 | 1 | 1
Preferred stock dividends, cash paid quarterly (per share) |  |  |  |  |  |  |  |  | $ 0.50 | $ 0.50 |
Payments of ordinary dividends, preferred stock and preference stock | $ |  |  |  |  |  |  |  |  |  | $ 234 |
Preferred stock dividend, final portion (in USD per share) |  |  |  |  |  |  |  |  |  | $ 0.11667 |
Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of quarters, dividend payments | dividend |  |  |  |  |  |  |  |  |  | 4 | 4
Preferred stock dividends, cash paid quarterly (per share) |  |  |  |  |  |  |  |  |  | $ 0.50 |
Payments of ordinary dividends, preferred stock and preference stock | $ |  |  |  |  |  |  |  |  | $ 4,600 | $ 4,600 |
Series D Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends, cash paid quarterly (per share) |  |  |  |  |  |  |  |  | $ 0.50 |  |
Payments of ordinary dividends, preferred stock and preference stock | $ |  |  |  |  |  |  |  |  | $ 6,400 | $ 6,400 |
Quarterly Dividend One | Pinewood | Series A Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends, cash paid quarterly (per share) | (per share) | $ 1,269.45 |  | $ 1,281.22 |  | $ 1,234.68 |  | $ 1,217.40 | ¥ 134,924.92 |  | $ 298.52 | ¥ 32,981.64
Quarterly Dividend Two | Pinewood | Series A Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends, cash paid quarterly (per share) | (per share) |  |  |  |  |  |  |  |  |  | $ 1,231.37 | ¥ 137,923.25
Payments of ordinary dividends, preferred stock and preference stock |  | ¥ 137,923.25 |  | ¥ 137,923.25 |  | ¥ 136,424.08 | $ 500 | ¥ 54,719,550.00 |  | $ 153 | ¥ 17,090,489.00
Quarterly Dividend Three | Pinewood | Series A Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock, per share, dividends declared (per share) | (per share) |  |  |  |  |  |  |  |  |  | $ 1,226.52 | ¥ 137,923.25
Dividends |  |  |  |  |  |  |  |  | $ 123 |  | ¥ 13,792,325.00

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