v3.19.3

Common Stock Capitalization (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 9 Months Ended | 16 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 26, 2019 | Jul. 23, 2019 | Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Jul. 22, 2019 | Jun. 30, 2019 | Feb. 28, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Jun. 13, 2018 | Feb. 06, 2018 | Dec. 31, 2017
Stockholders' Equity Note [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  | 100,000,000 |  |  |  | 100,000,000 |  | 100,000,000 |  |  |  | 100,000,000 |  |  |  |
Common shares |  |  | $ 0.001 |  |  |  | $ 0.001 |  | $ 0.001 |  |  | $ 0.001 |  |  |  |  |
Common stock, shares outstanding |  |  | 33,774,386 |  |  | 30,155,055 | 33,774,386 | 30,155,055 | 33,774,386 |  | 29,745,776 |  | 29,796,601 | 30,149,880 |  |  | 31,335,938
Dividends declared (in usd per share) |  |  | $ 0.42 |  |  | $ 0.41 | $ 1.39 | $ 1.23 |  |  |  |  |  |  |  |  |
Dividends declared |  |  | $ 14,500 |  |  |  | $ 44,100 |  |  |  |  |  |  |  |  |  |
Dividends paid |  |  |  |  |  | $ (12,700) | $ (39,226) | $ (38,152) |  |  |  |  |  |  |  |  |
Common shares issued and outstanding upon conversion of all convertible securities (in shares) |  |  | 34,518,699 |  |  | 30,871,043 | 34,518,699 | 30,871,043 | 34,518,699 |  |  |  |  |  |  |  |
Number of shares authorized to be repurchased (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,550,000 | 1,550,000 |
Shares repurchased (in shares) |  |  | 0 |  |  | 0 | 50,825 | 1,186,058 | 411,915 |  |  |  |  |  |  |  |
Average price per share (USD per share) |  |  |  |  |  |  | $ 15.39 | $ 14.83 | $ 15.34 |  |  |  |  |  |  |  |
Total cost |  |  |  |  | $ (782) | $ 0 | $ (800) | $ (17,593) | $ (6,300) |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 525,000 | 3,500,000 | 4,025,000 | [1] |  |  | 4,025,000 |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of shares, net | $ 9,100 |  |  |  |  |  |  |  |  | $ 60,700 |  |  |  |  |  |  |
[1] | Net of underwriters' discount and offering costs.

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