v3.8.0.1

Common Share Capitalization (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Mar. 06, 2017
Common Stock Capitalization [Line Items] |  |  |  |  |
Dividends declared (in usd per share) | $ 0.45 | $ 0.50 | $ 1.35 | $ 1.50 |
Payments of Dividends | $ 14,800 | $ 16,600 | $ 44,336 | $ 50,256 |
Common Shares Issued And Outstanding Upon Conversion of All Convertible Securities | 32,680,917 | 33,286,926 | 32,680,917 | 33,286,926 |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  |  |  | 1,700,000
Shares repurchased | 123,321 | 126,771 | 305,327 | 509,427 |
Stock Repurchased and Retired During Period, Value | $ 1,900 |  | $ 4,791 | $ 8,797 |
Stock Repurchases, Average Price Per Share | $ 15.60 |  | $ 15.69 |  |

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