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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total | Total Stockholders' Equity | Shares | Additional Paid-in Capital | Accumulated Deficit | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2012 |  |  | 137,507,010 |  |  |
Balance at Dec. 31, 2012 | $ 3,416,251 | $ 3,077,529 | $ 1,375 | $ 3,715,895 | $ (639,741) | $ 338,722
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 448,959 | 420,090 |  |  | 420,090 | 28,869
Amortization of share and unit-based plans (in shares) |  |  | 88,039 |  |  |
Amortization of share and unit-based plans | 28,122 | 28,122 | $ 0 | 28,122 |  |
Exercise of stock options (in shares) |  |  | 2,700 |  |  |
Exercise of stock options | 99 | 99 |  | 99 |  |
Employee stock purchases (in shares) |  |  | 22,112 |  |  |
Employee stock purchases | $ 1,089 | 1,089 |  | 1,089 |  |
Stock offerings, net (in shares) | 2,456,956 |  | 2,456,956 |  |  |
Stock issued to acquire properties | $ 171,102 | 171,102 | $ 25 | 171,077 |  |
Distributions paid | (329,155) | (329,155) |  |  | (329,155) |
Distributions to noncontrolling interests | (31,202) |  |  |  |  | (31,202)
Contributions from noncontrolling interests | 18,079 |  |  |  |  | 18,079
Other | (3,561) | (3,561) |  | (3,561) |  |
Conversion of noncontrolling interests to common shares (in shares) |  |  | 656,866 |  |  |
Conversion of noncontrolling interests to common shares |  | 12,984 | $ 7 | 12,977 |  | (12,984)
Redemption of noncontrolling interests | (1,066) | (733) |  | (733) |  | (333)
Adjustment of noncontrolling interests in Operating Partnership |  | (18,817) |  | (18,817) |  | 18,817
Balance (in shares) at Dec. 31, 2013 |  |  | 140,733,683 |  |  |
Balance at Dec. 31, 2013 | 3,718,717 | 3,358,749 | $ 1,407 | 3,906,148 | (548,806) | 359,968
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 1,606,931 | 1,499,042 |  |  | 1,499,042 | 107,889
Amortization of share and unit-based plans (in shares) |  |  | 168,379 |  |  |
Amortization of share and unit-based plans | 34,873 | 34,873 | $ 2 | 34,871 |  |
Employee stock purchases (in shares) |  |  | 25,007 |  |  |
Employee stock purchases | 1,231 | 1,231 |  | 1,231 |  |
Stock offerings, net (in shares) |  |  | 17,140,845 |  |  |
Stock issued to acquire properties | 1,161,274 | 1,161,274 | $ 172 | 1,161,102 |  |
Distributions paid | (353,495) | (353,495) |  |  | (353,495) |
Distributions to noncontrolling interests | (32,230) |  |  |  |  | (32,230)
Other | (97,216) | (3,858) |  | (3,858) |  | (93,358)
Conversion of noncontrolling interests to common shares (in shares) |  |  | 134,082 |  |  |
Conversion of noncontrolling interests to common shares |  | 2,410 | $ 1 | 2,409 |  | (2,410)
Redemption of noncontrolling interests | $ (236) | (157) |  | (157) |  | (79)
Adjustment of noncontrolling interests in Operating Partnership |  | (59,949) |  | (59,949) |  | 59,949
Balance (in shares) at Dec. 31, 2014 | 158,201,996 |  | 158,201,996 |  |  |
Balance at Dec. 31, 2014 | $ 6,039,849 | 5,640,120 | $ 1,582 | 5,041,797 | 596,741 | 399,729
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 522,912 | 487,562 |  |  | 487,562 | 35,350
Amortization of share and unit-based plans (in shares) |  |  | 241,186 |  |  |
Amortization of share and unit-based plans | 34,375 | 34,375 | $ 2 | 34,373 |  |
Employee stock purchases (in shares) |  |  | 23,036 |  |  |
Employee stock purchases | 1,512 | 1,512 |  | 1,512 |  |
Stock repurchase (in shares) |  |  | (4,140,788) |  |  |
Stock repurchase | (400,144) | (400,144) | $ (41) | (153,602) | (246,501) | 0
Distributions paid | (1,050,562) | (1,050,562) |  |  | (1,050,562) |
Distributions to noncontrolling interests | (74,677) |  |  |  |  | (74,677)
Contributions from noncontrolling interests | 23 |  |  |  |  | 23
Other | (1,593) | (1,593) |  | (1,593) |  | 0
Conversion of noncontrolling interests to common shares (in shares) |  |  | 79,556 |  |  |
Conversion of noncontrolling interests to common shares |  | 1,559 | $ 1 | 1,558 |  | (1,559)
Redemption of noncontrolling interests | $ (456) | (343) |  | (343) |  | (113)
Adjustment of noncontrolling interests in Operating Partnership |  | 2,928 |  | 2,928 |  | (2,928)
Balance (in shares) at Dec. 31, 2015 | 154,404,986 |  | 154,404,986 |  |  |
Balance at Dec. 31, 2015 | $ 5,071,239 | $ 4,715,414 | $ 1,544 | $ 4,926,630 | $ (212,760) | $ 355,825

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