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Consolidated Statement of Equity (Unaudited) - USD ($) $ in Thousands | Total | Dividend Distributions Payable | Series D Cumulative Redeemable Preferred Stock | Series D Cumulative Redeemable Preferred Stock Dividend Distributions Payable | Series C Cumulative Preferred Stock | Series C Cumulative Preferred Stock Dividend Paid | Series C Cumulative Preferred Stock Dividend Distributions Payable | Total Saul Centers, Inc. | Total Saul Centers, Inc. Dividend Distributions Payable | Total Saul Centers, Inc. Series D Cumulative Redeemable Preferred Stock | Total Saul Centers, Inc. Series D Cumulative Redeemable Preferred Stock Dividend Distributions Payable | Total Saul Centers, Inc. Series C Cumulative Preferred Stock | Total Saul Centers, Inc. Series C Cumulative Preferred Stock Dividend Paid | Total Saul Centers, Inc. Series C Cumulative Preferred Stock Dividend Distributions Payable | Preferred Stock | Preferred Stock Series D Cumulative Redeemable Preferred Stock | Preferred Stock Series C Cumulative Preferred Stock | Common Stock | Additional Paid-in Capital | Additional Paid-in Capital Series D Cumulative Redeemable Preferred Stock | Additional Paid-in Capital Series C Cumulative Preferred Stock | Distributions in Excess of Accumulated Earnings | Distributions in Excess of Accumulated Earnings Dividend Distributions Payable | Distributions in Excess of Accumulated Earnings Series D Cumulative Redeemable Preferred Stock Dividend Distributions Payable | Distributions in Excess of Accumulated Earnings Series C Cumulative Preferred Stock | Distributions in Excess of Accumulated Earnings Series C Cumulative Preferred Stock Dividend Paid | Distributions in Excess of Accumulated Earnings Series C Cumulative Preferred Stock Dividend Distributions Payable | Accumulated Other Comprehensive (Loss) | Noncontrolling Interest | Noncontrolling Interest Dividend Distributions Payable
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 | $ 393,103 |  |  |  |  |  |  | $ 334,405 |  |  |  |  |  |  | $ 180,000 |  |  | $ 221 | $ 352,590 |  |  | $ (197,710) |  |  |  |  |  | $ (696) | $ 58,698 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of 30,000 shares of Series D Cumulative preferred stock |  |  | $ 72,369 |  |  |  |  |  |  | $ 72,369 |  |  |  |  |  | $ 75,000 |  |  |  | $ (2,631) |  |  |  |  |  |  |  |  |  |
Redemption of 30,000 shares of Series C Cumulative preferred stock |  |  |  |  | $ (75,017) |  |  |  |  |  |  | $ (75,017) |  |  |  |  | $ (75,000) |  |  |  | $ 2,311 |  |  |  | $ (2,328) |  |  |  |  |
Issuance of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares pursuant to dividend reinvestment plan | 3,677 |  |  |  |  |  |  | 3,677 |  |  |  |  |  |  |  |  |  | 1 | 3,676 |  |  |  |  |  |  |  |  |  |  |
Issuance of shares due to exercise of employee stock options, director share grant and issuance of directors’ deferred shares | 769 |  |  |  |  |  |  | 769 |  |  |  |  |  |  |  |  |  |  | 769 |  |  |  |  |  |  |  |  |  |  |
Issuance of 38,037 partnership units pursuant to dividend reinvestment plan | 2,017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,017 |
Net income | 14,947 |  |  |  |  |  |  | 12,588 |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,588 |  |  |  |  |  |  | 2,359 |
Change in unrealized loss on cash flow hedge | 389 |  |  |  |  |  |  | 289 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 289 | 100 |
Preferred stock distributions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock distributions |  |  |  | $ (868) |  | $ (730) | $ (1,805) |  |  |  | $ (868) |  | $ (730) | $ (1,805) |  |  |  |  |  |  |  |  |  | $ (868) |  | $ (730) | $ (1,805) |  |  |
Common stock distributions payable |  | $ (15,494) |  |  |  |  |  |  | $ (11,552) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (11,552) |  |  |  |  |  |  | $ (3,942)
Ending Balance at Mar. 31, 2018 | 393,357 |  |  |  |  |  |  | 334,125 |  |  |  |  |  |  | 180,000 |  |  | 222 | 356,715 |  |  | (202,405) |  |  |  |  |  | (407) | 59,232 |
Beginning Balance at Dec. 31, 2018 | 425,220 |  |  |  |  |  |  | 355,912 |  |  |  |  |  |  | 180,000 |  |  | 227 | 384,533 |  |  | (208,593) |  |  |  |  |  | (255) | 69,308 |
Issuance of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares pursuant to dividend reinvestment plan | 6,171 |  |  |  |  |  |  | 6,171 |  |  |  |  |  |  |  |  |  | 1 | 6,170 |  |  |  |  |  |  |  |  |  |  |
Issuance of shares due to exercise of employee stock options, director share grant and issuance of directors’ deferred shares | 420 |  |  |  |  |  |  | 420 |  |  |  |  |  |  |  |  |  | 1 | 419 |  |  |  |  |  |  |  |  |  |  |
Issuance of 13,742 partnership units pursuant to dividend reinvestment plan | 705 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 705 |
Net income | 17,077 |  |  |  |  |  |  | 13,447 |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,447 |  |  |  |  |  |  | 3,630 |
Change in unrealized loss on cash flow hedge | (46) |  |  |  |  |  |  | (34) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (34) | (12) |
Preferred stock distributions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock distributions |  |  |  | $ (1,148) |  |  | $ (1,805) |  |  |  | $ (1,148) |  |  | $ (1,805) |  |  |  |  |  |  |  |  |  | $ (1,148) |  |  | $ (1,805) |  |  |
Common stock distributions payable |  | $ (16,263) |  |  |  |  |  |  | $ (12,108) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (12,108) |  |  |  |  |  |  | $ (4,155)
Ending Balance at Mar. 31, 2019 | $ 430,331 |  |  |  |  |  |  | $ 360,855 |  |  |  |  |  |  | $ 180,000 |  |  | $ 229 | $ 391,122 |  |  | $ (210,207) |  |  |  |  |  | $ (289) | $ 69,476 |

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