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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Supplemental disclosures of non-cash investing and financing activities |  |  |  |  |
Common stock issued through the dividend reinvestment plan (in shares) |  |  | 1,135 | 1,828 |
Common stock issued through the dividend reinvestment plan |  |  | $ 190 | $ 331 |
Number of shares withheld to satisfy employees' tax withholding and other liabilities (in shares) |  |  | 67,854 | 59,019 |
Shares withheld to satisfy employees' tax withholding and other liabilities, value |  |  | $ 10,524 | $ 10,496 |
Stock issued during period, shares, share-based compensation, forfeited (in shares) |  |  | 4,434 |  |
Stock issued during period, value, share-based compensation, forfeited |  |  | $ 648 | 381 |
Dividends declared but not paid | $ 203,472 | $ 196,079 | 203,472 | 196,079 | $ 196,094
Change in redemption value of redeemable noncontrolling interest |  |  | (354) |  |
Cash flow hedge losses reclassified to earnings | (1,455) | (1,781) | (3,213) | (3,534) |
Increase (decrease) in prepaid expense and other assets |  |  |  | 674 |
Increase in accrued expenses, other liabilities and accrued interest payable |  |  |  | 1,612 |
Net operating real estate | $ 16,064,165 |  | $ 16,064,165 |  | $ 16,342,893
Avalon Maplewood |  |  |  |  |
Supplemental disclosures of non-cash investing and financing activities |  |  |  |  |
Net operating real estate |  | $ 16,361 |  | $ 16,361 |
Restricted Stock and Restricted Stock Converted From Performance Shares |  |  |  |  |
Supplemental disclosures of non-cash investing and financing activities |  |  |  |  |
Equity instruments granted (in shares) |  |  | 186,382 | 201,314 |
Restricted Stock Converted From Performance Shares |  |  |  |  |
Supplemental disclosures of non-cash investing and financing activities |  |  |  |  |
Equity instruments granted (in shares) |  |  | 88,297 | 128,482 |
Restricted stock |  |  |  |  |
Supplemental disclosures of non-cash investing and financing activities |  |  |  |  |
Equity instruments granted (in shares) |  |  | 98,085 | 72,832 |
Fair value of shares issued |  |  | $ 15,837 | $ 13,079 |
Stock issued during period, shares, share-based compensation, forfeited (in shares) |  |  | 4,434 | 2,211 |
Accumulated earnings less dividends |  |  |  |  |
Supplemental disclosures of non-cash investing and financing activities |  |  |  |  |
Change in redemption value of redeemable noncontrolling interest |  |  | $ (354) | $ 397 |

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