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Shareholders' Equity (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Mar. 13, 2017 | Mar. 07, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |  |  |
Beginning Balance |  |  |  |  | $ 974,957 |
Proceeds from exercise of stock options, value |  |  |  |  | $ 6,786 |
Proceeds from exercise of stock options (shares) |  |  |  |  | 348,000 |
Stock-based compensation expense |  |  |  |  | $ 14,852 |
Restricted stock granted, value |  |  |  |  | 0 |
Restricted stock canceled |  |  |  |  | 0 |
Dividends paid |  |  |  |  | (169,152) |
Issuance of common stock - prospectus supplement |  |  |  |  | 275,867 |
Issuance of common stock - prospectus supplement (shares) | 10,350,000 | 9,000,000 |  |  |  |
Shares withheld for net settlements of share-based awards |  |  |  |  | (4,122) |
Issuance of common stock - ESPP |  |  |  |  | 382 |
Net income |  |  | $ 38,453 | $ 43,674 | 109,761 | $ 99,156
Other comprehensive income |  |  | 1,625 | $ 483 | 4,761 | $ (2,983)
Ending Balance |  |  | 1,214,092 |  | 1,214,092 |
Common shares |  |  |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |  |  |
Beginning Balance |  |  |  |  | $ 1,125 |
Beginning Balance, shares |  |  |  |  | 112,548,000 |
Proceeds from exercise of stock options, value |  |  |  |  | $ 3 |
Proceeds from exercise of stock options (shares) |  |  |  |  | 348,000 |
Restricted stock granted, value |  |  |  |  | $ 9 |
Restricted stock granted (shares) |  |  |  |  | 927,000 |
Restricted stock canceled (shares) |  |  |  |  | (60,000) |
Issuance of common stock - prospectus supplement |  |  |  |  | $ 104 |
Issuance of common stock - prospectus supplement (shares) |  |  |  |  | 10,350,000 |
Shares withheld for net settlements of share-based awards |  |  |  |  | $ (1) |
Shares withheld for net settlements of share-based awards (shares) |  |  |  |  | (135,000) |
Re-issuance of treasury shares - ESPP (shares) |  |  |  |  | 13,000 |
Ending Balance |  |  | $ 1,240 |  | $ 1,240 |
Ending Balance, shares |  |  | 123,991,000 |  | 123,991,000 |
Additional Paid-In Capital |  |  |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |  |  |
Beginning Balance |  |  |  |  | $ 891,993 |
Proceeds from exercise of stock options, value |  |  |  |  | 6,783 |
Stock-based compensation expense |  |  |  |  | 14,852 |
Restricted stock granted, value |  |  |  |  | (9) |
Issuance of common stock - prospectus supplement |  |  |  |  | 275,763 |
Shares withheld for net settlements of share-based awards |  |  |  |  | (4,121) |
Issuance of common stock - ESPP |  |  |  |  | 382 |
Ending Balance |  |  | $ 1,185,643 |  | 1,185,643 |
Earnings in Excess of Distributions |  |  |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |  |  |
Beginning Balance |  |  |  |  | 112,763 |
Dividends paid |  |  |  |  | (169,152) |
Net income |  |  |  |  | 109,884 |
Ending Balance |  |  | 53,495 |  | 53,495 |
Accumulated Other Comprehensive Loss |  |  |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |  |  |
Beginning Balance |  |  |  |  | (30,825) |
Other comprehensive income |  |  |  |  | 4,757 |
Ending Balance |  |  | (26,068) |  | (26,068) |
Noncontrolling Interests |  |  |  |  |  |
Changes in shareholders' equity that are attributable to the Company's shareholders and to non controlling interests |  |  |  |  |  |
Beginning Balance |  |  |  |  | (99) |
Net income |  |  |  |  | (123) |
Other comprehensive income |  |  |  |  | 4 |
Ending Balance |  |  | $ (218) |  | $ (218) |

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