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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2014 |  | $ 54,830 | $ 948,340 | $ 6,335,990 | $ (96,673) | $ (4,032,615) | $ 74,229
Exercise, settlement and vesting of stock based compensation awards | $ 61,863 | 0 | (22,781) | 0 | 0 | 62,835 | 460
Stock based compensation expense |  | 0 | 42,643 | 0 | 0 | 0 | 163
Tax benefits on stock-based compensation awards |  | 0 | 31,614 | 0 | 0 | 0 | 0
Purchase of treasury stock |  |  | 0 | 0 |  | (1,399,931) | (140)
Net earnings attributable to W.W. Grainger, Inc. | 768,996 | 0 | 0 | 768,996 | 0 | 0 |
Net earnings attributable to noncontrolling interest | 16,178 |  |  |  |  |  | 16,178
Other comprehensive (losses) earnings |  | 0 | 0 | 0 | (124,418) | 0 | (532)
Cash dividends paid |  | 0 | 660 | (302,856) | 0 | 0 | (4,278)
Ending balance at Dec. 31, 2015 |  | 54,830 | 1,000,476 | 6,802,130 | (221,091) | (5,369,711) | 86,080
Exercise, settlement and vesting of stock based compensation awards | 34,573 | 0 | (18,137) | 0 | 0 | 41,307 | 58
Stock based compensation expense |  | 0 | 34,915 | 0 | 0 | 0 | 441
Tax benefits on stock-based compensation awards |  | 0 | 12,284 | 0 | 0 | 0 | 0
Purchase of treasury stock |  |  | 0 | 0 |  | (800,012) | (130)
Net earnings attributable to W.W. Grainger, Inc. | 605,928 | 0 | 0 | 605,928 | 0 | 0 |
Net earnings attributable to noncontrolling interest | 26,910 |  |  |  |  |  | 26,910
Other comprehensive (losses) earnings |  | 0 | 0 | 0 | (51,203) | 0 | 3,664
Cash dividends paid |  | 0 | 718 | (294,499) | 0 | 0 | (9,190)
Ending balance at Dec. 31, 2016 | 1,905,768 | 54,830 | 1,030,256 | 7,113,559 | (272,294) | (6,128,416) | 107,833
Exercise, settlement and vesting of stock based compensation awards | 47,181 | 0 | (22,906) | 0 | 0 | 60,273 | 206
Stock based compensation expense |  | 0 | 32,514 | 0 | 0 | 0 | 137
Purchase of treasury stock |  |  | 0 | 0 |  | (607,566) | (114)
Net earnings attributable to W.W. Grainger, Inc. | 585,730 | 0 | 0 | 585,730 | 0 | 0 |
Net earnings attributable to noncontrolling interest | 36,713 |  |  |  |  |  | 36,713
Other comprehensive (losses) earnings |  | 0 | 0 | 0 | 137,620 | 0 | 3,831
Cash dividends paid |  | 0 | 629 | (294,097) | 0 | 0 | (11,005)
Ending balance at Dec. 31, 2017 | $ 1,827,733 | $ 54,830 | $ 1,040,493 | $ 7,405,192 | $ (134,674) | $ (6,675,709) | $ 137,601

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