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Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-In Capital | (Distributions in Excess of Earnings/Earnings in Excess of Distributions | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2015 |  | $ 1,006,837 | $ 1,121 | $ 879,225 | $ 158,796 | $ (32,404) | $ 0 | $ 99
Beginning Balance (in shares) at Dec. 31, 2015 |  |  | 111,966 |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Proceeds from stock options exercised |  | 3,347 | $ 2 | 3,345 |  |  |  |
Proceeds from stock options exercised (in shares) |  |  | 234 |  |  |  |  |
Tax benefit related to equity compensation |  | (1,626) |  | (1,626) |  |  |  |
Stock based compensation expense |  | 12,773 |  | 12,773 |  |  |  |
Shares withheld for net settlements of share-based awards (in shares) |  |  | (113) |  |  |  | 0 |
Shares withheld for net settlements of share-based awards |  | (2,337) | $ (2) | (2,335) |  |  | $ 0 |
Restricted stock granted |  | 0 | $ 5 | (5) |  |  |  |
Restricted stock granted (in shares) |  |  | 523 |  |  |  |  |
Restricted stock canceled |  | 0 | $ (1) | 1 |  |  |  |
Restricted stock canceled (in shares) |  |  | (84) |  |  |  |  |
Dividends - paid |  | (194,748) |  |  | (194,748) |  |  |
Re-issuance of treasury shares (ESPP) (in shares) |  |  | 22 |  |  |  | 0 |
Re-issuance of treasury shares (ESPP) |  | 436 |  | 436 | 0 |  | $ 0 |
Net income (loss) |  | 148,498 |  |  | 148,715 |  |  | (217)
Other comprehensive income (loss) |  | 1,598 |  |  |  | 1,579 |  | 19
Ending Balance at Dec. 31, 2016 |  | 974,957 | $ 1,125 | 891,993 | 112,763 | (30,825) | $ 0 | (99)
Ending Balance (in shares) at Dec. 31, 2016 |  |  | 112,548 |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Proceeds from stock options exercised |  | 6,962 | $ 4 | 6,958 |  |  |  |
Proceeds from stock options exercised (in shares) |  |  | 358 |  |  |  |  |
Stock based compensation expense |  | 19,844 |  | 19,844 |  |  |  |
Shares withheld for net settlements of share-based awards (in shares) |  |  | (136) |  |  |  | 0 |
Shares withheld for net settlements of share-based awards |  | (4,142) |  | (4,141) |  |  | $ 0 |
Restricted stock granted |  | 0 | $ 9 | (9) |  |  |  |
Restricted stock granted (in shares) |  |  | 933 |  |  |  |  |
Restricted stock canceled |  | 0 | $ (1) | 1 |  |  |  |
Restricted stock canceled (in shares) |  |  | (65) |  |  |  |  |
Dividends - paid |  | (227,463) |  |  | (227,463) |  |  |
Issuance of common stock - prospectus supplement (in shares) |  |  | 10,350 |  |  |  |  |
Issuance of common stock - prospectus supplement |  | 275,867 | $ 104 | 275,763 | 0 |  |  |
Issuance of common stock (ESPP) (in shares) |  |  | 20 |  |  |  |  |
Issuance of common stock (ESPP) |  | 497 |  | 497 |  |  |  |
Net income (loss) |  | 146,024 |  |  | 146,241 |  |  | (217)
Other comprehensive income (loss) |  | 6,373 |  |  |  | 6,379 |  | (6)
Ending Balance at Dec. 31, 2017 |  | 1,198,919 | $ 1,240 | 1,190,906 | 31,541 | (24,446) | $ 0 | (322)
Ending Balance (in shares) at Dec. 31, 2017 |  |  | 124,008 |  |  |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Proceeds from stock options exercised |  | $ 1,887 | $ 1 | 1,886 |  |  |  |
Proceeds from stock options exercised (in shares) |  | 103 | 103 |  |  |  |  |
Stock based compensation expense |  | $ 22,049 |  | 22,049 |  |  |  |
Shares withheld for net settlements of share-based awards (in shares) |  |  | (173) |  |  |  |  |
Shares withheld for net settlements of share-based awards |  | (3,820) | $ (2) | (3,818) |  |  |  |
Restricted stock granted |  | 0 | $ 9 | (9) |  |  |  |
Restricted stock granted (in shares) |  |  | 906 |  |  |  |  |
Restricted stock canceled |  | 0 | $ 0 | 0 |  |  |  |
Restricted stock canceled (in shares) |  |  | (73) |  |  |  |  |
Dividends - paid |  | (229,498) |  |  | (229,498) |  |  |
Purchase of treasury shares (in shares) |  |  |  |  |  |  | 4,210 |
Purchase of treasury shares |  | (95,175) |  |  |  |  | $ (95,175) |
Issuance of common stock (ESPP) (in shares) |  |  | 24 |  |  |  |  |
Issuance of common stock (ESPP) |  | 534 |  | 534 |  |  |  |
Other Adjustments to Additional Paid-in Capital | [1] | (632) |  | (632) |  |  |  |
Net income (loss) |  | 144,827 |  |  | 145,089 |  |  | (262)
Other comprehensive income (loss) |  | 813 |  |  |  | 828 |  | (15)
Ending Balance at Dec. 31, 2018 |  | $ 1,039,904 | $ 1,248 | $ 1,210,916 | $ (52,868) | $ (23,618) | $ (95,175) | $ (599)
Ending Balance (in shares) at Dec. 31, 2018 |  |  | 120,585 |  |  |  | 4,210 |
[1] | Represents a cumulative-effect adjustment upon adoption of ASU No. 2016-16, "Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory." Refer to Note 1 - Summary of Business Organization, Operations and Significant Accounting Policies - Recent Accounting Pronouncements for further information.

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