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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands | Parent | Common Stock | Capital in Excess of Par Value | Cumulative Net Income | Cumulative Distributions | Non-controlling Interests | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2016 | $ 740,048 | $ 392 | $ 839,005 | $ 1,013,443 | $ (1,112,792) |  | $ 740,048
Balance (in shares) at Dec. 31, 2016 |  | 39,221 |  |  |  |  |
Equity activity |  |  |  |  |  |  |
Common stock cash distributions | (90,219) |  |  |  | (90,219) |  | (90,219)
Issuance of common stock | 14,529 | $ 3 | 14,526 |  |  |  | 14,529
Issuance of common stock (in shares) |  | 313 |  |  |  |  |
Issuance of restricted stock | (20) | $ 1 | (21) |  |  |  | (20)
Issuance of restricted stock (in shares) |  | 85 |  |  |  |  |
Stock option exercises | 202 |  | 202 |  |  |  | 202
Stock option exercises (in shares) |  | 8 |  |  |  |  |
Stock-based compensation expense | 5,247 |  | 5,247 |  |  |  | 5,247
Net income | 87,340 |  |  | 87,340 |  |  | 87,340
Non-controlling interests contributions |  |  |  |  |  | $ 3,488 | 3,488
Other | (1,969) |  | (1,969) |  |  |  | (1,969)
Other (in shares) |  | (57) |  |  |  |  |
Vested stock options | 2 |  | 2 |  |  |  | 2
Balance at end of period at Dec. 31, 2017 | 755,160 | $ 396 | 856,992 | 1,100,783 | (1,203,011) | 3,488 | 758,648
Balance (in shares) at Dec. 31, 2017 |  | 39,570 |  |  |  |  |
Equity activity |  |  |  |  |  |  |
Common stock cash distributions | (90,372) |  |  |  | (90,372) |  | (90,372)
Issuance of common stock | 929 |  | 929 |  |  |  | 929
Issuance of common stock (in shares) |  | 22 |  |  |  |  |
Issuance of restricted stock | (8) | $ 1 | (9) |  |  |  | (8)
Issuance of restricted stock (in shares) |  | 91 |  |  |  |  |
Stock option exercises | 123 |  | 123 |  |  |  | 123
Stock option exercises (in shares) |  | 5 |  |  |  |  |
Stock-based compensation expense | 5,870 |  | 5,870 |  |  |  | 5,870
Net income | 154,981 |  |  | 154,981 |  | 95 | 155,076
Non-controlling interests contributions |  |  |  |  |  | 3,963 | 3,963
Non-controlling interest distributions |  |  |  |  |  | (65) | (65)
Other | (1,193) |  | (1,193) |  |  |  | (1,193)
Other (in shares) |  | (31) |  |  |  |  |
Balance at end of period at Dec. 31, 2018 | 825,490 | $ 397 | 862,712 | 1,255,764 | (1,293,383) | 7,481 | 832,971
Balance (in shares) at Dec. 31, 2018 |  | 39,657 |  |  |  |  |
Equity activity |  |  |  |  |  |  |
As Adjusted Balance at January 1, 2019 | 782,682 | $ 397 | 862,712 | 1,212,956 | (1,293,383) | 7,481 | 790,163
Net income |  |  |  |  |  |  | 80,872
Vesting of performance-based stock units | (301) |  |  |  | (301) |  | (301)
Vesting of performance-based stock units |  | 48 |  |  |  |  |
Balance at end of period at Dec. 31, 2019 | 776,943 | $ 398 | 867,346 | 1,293,482 | (1,384,283) | 8,483 | 785,426
Balance (in shares) at Dec. 31, 2019 |  | 39,752 |  |  |  |  |
Equity activity |  |  |  |  |  |  |
Cumulative effect of the adoption of the ASC 842 | (42,808) |  |  | (42,808) |  |  | (42,808)
Common stock cash distributions | (90,599) |  |  |  | (90,599) |  | (90,599)
Issuance of restricted stock | (7) |  | (7) |  |  |  | (7)
Issuance of restricted stock (in shares) |  | 86 |  |  |  |  |
Stock option exercises | 123 | $ 1 | 122 |  |  |  | 123
Stock option exercises (in shares) |  | 5 |  |  |  |  |
Stock-based compensation expense | 6,566 |  | 6,566 |  |  |  | 6,566
Net income | 80,526 |  |  | 80,526 |  | 346 | 80,872
Non-controlling interests contributions |  |  |  |  |  | 965 | 965
Non-controlling interest distributions |  |  |  |  |  | (309) | (309)
Other | (2,047) |  | (2,047) |  |  |  | (2,047)
Other (in shares) |  | (44) |  |  |  |  |
Balance at end of period at Dec. 31, 2019 | $ 776,943 | $ 398 | $ 867,346 | $ 1,293,482 | $ (1,384,283) | $ 8,483 | $ 785,426
Balance (in shares) at Dec. 31, 2019 |  | 39,752 |  |  |  |  |

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