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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Dividend paid | Dividend declared | Series C Preferred Stock | Series C Preferred Stock Dividend paid | Series C Preferred Stock Dividend declared | Series A Preferred Stock | Series A Preferred Stock Dividend paid | Preferred Stock | Preferred Stock Series C Preferred Stock | Preferred Stock Series A Preferred Stock | Common Stock | Additional Paid-in Capital | Additional Paid-in Capital Series C Preferred Stock | Additional Paid-in Capital Series A Preferred Stock | Accumulated Deficit | Accumulated Deficit Dividend paid | Accumulated Deficit Dividend declared | Accumulated Deficit Series C Preferred Stock Dividend paid | Accumulated Deficit Series C Preferred Stock Dividend declared | Accumulated Deficit Series A Preferred Stock | Accumulated Deficit Series A Preferred Stock Dividend paid | Accumulated Other Comprehensive (Loss) | Total Saul Centers, Inc. | Total Saul Centers, Inc. Dividend paid | Total Saul Centers, Inc. Dividend declared | Total Saul Centers, Inc. Series C Preferred Stock | Total Saul Centers, Inc. Series C Preferred Stock Dividend paid | Total Saul Centers, Inc. Series C Preferred Stock Dividend declared | Total Saul Centers, Inc. Series A Preferred Stock | Total Saul Centers, Inc. Series A Preferred Stock Dividend paid | Noncontrolling Interests | Noncontrolling Interests Dividend paid | Noncontrolling Interests Dividend declared
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Beginning balance at Dec. 31, 2013 | $ 315,126 |  |  |  |  |  |  |  | $ 180,000 |  |  | $ 206 | $ 270,428 |  |  | $ (172,564) |  |  |  |  |  |  | $ (1,392) | $ 276,678 |  |  |  |  |  |  |  | $ 38,448 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares of preferred stock |  |  |  | $ 39,260 |  |  |  |  |  | $ 40,000 |  |  |  | $ (740) |  |  |  |  |  |  |  |  |  |  |  |  | $ 39,260 |  |  |  |  |  |  |
Redemption of preferred stock |  |  |  |  |  |  | $ (40,000) |  |  |  | $ (40,000) |  |  |  | $ 1,475 |  |  |  |  |  | $ (1,475) |  |  |  |  |  |  |  |  | $ (40,000) |  |  |  |
Issuance of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued pursuant to dividend reinvestment plan | 9,264 |  |  |  |  |  |  |  |  |  |  | 2 | 9,262 |  |  |  |  |  |  |  |  |  |  | 9,264 |  |  |  |  |  |  |  |  |  |
Shares issued due to exercise of employee stock options and issuance of directors' deferred stock | 7,571 |  |  |  |  |  |  |  |  |  |  | 1 | 7,570 |  |  |  |  |  |  |  |  |  |  | 7,571 |  |  |  |  |  |  |  |  |  |
Issuance of partnership units pursuant to dividend reinvestment plan | 8,877 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,877 |  |
Net income | 57,988 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 46,943 |  |  |  |  |  |  |  | 46,943 |  |  |  |  |  |  |  | 11,045 |  |
Change in unrealized loss on cash flow hedge | (675) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (502) | (502) |  |  |  |  |  |  |  | (173) |  |
Preferred stock distributions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock distributions |  |  |  |  | $ (7,219) | $ (3,094) |  | $ (3,049) |  |  |  |  |  |  |  |  |  |  | $ (7,219) | $ (3,094) |  | $ (3,049) |  |  |  |  |  | $ (7,219) | $ (3,094) |  | $ (3,049) |  |  |
Common stock distributions |  | $ (33,534) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (24,937) |  |  |  |  |  |  |  | $ (24,937) |  |  |  |  |  |  |  | $ (8,597) |
Distributions payable common stock and distributions payable partnership units |  |  | $ (11,258) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (8,379) |  |  |  |  |  |  |  | $ (8,379) |  |  |  |  |  |  |  | $ (2,879)
Ending balance at Dec. 31, 2014 | 339,257 |  |  |  |  |  |  |  | 180,000 |  |  | 209 | 287,995 |  |  | (173,774) |  |  |  |  |  |  | (1,894) | 292,536 |  |  |  |  |  |  |  | 46,721 |  |
Issuance of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued pursuant to dividend reinvestment plan | 10,650 |  |  |  |  |  |  |  |  |  |  | 3 | 10,647 |  |  |  |  |  |  |  |  |  |  | 10,650 |  |  |  |  |  |  |  |  |  |
Shares issued due to exercise of employee stock options and issuance of directors' deferred stock | 6,367 |  |  |  |  |  |  |  |  |  |  | 1 | 6,366 |  |  |  |  |  |  |  |  |  |  | 6,367 |  |  |  |  |  |  |  |  |  |
Issuance of partnership units pursuant to dividend reinvestment plan | 5,673 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,673 |  |
Net income | 52,931 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,468 |  |  |  |  |  |  |  | 42,468 |  |  |  |  |  |  |  | 10,463 |  |
Change in unrealized loss on cash flow hedge | 124 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92 | 92 |  |  |  |  |  |  |  | 32 |  |
Preferred stock distributions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock distributions |  |  |  |  | (9,282) | (3,093) |  |  |  |  |  |  |  |  |  |  |  |  | (9,282) | (3,093) |  |  |  |  |  |  |  | (9,282) | (3,093) |  |  |  |  |
Common stock distributions |  | (36,614) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (27,265) |  |  |  |  |  |  |  | (27,265) |  |  |  |  |  |  |  | (9,349) |
Distributions payable common stock and distributions payable partnership units |  |  | (12,286) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (9,145) |  |  |  |  |  |  |  | (9,145) |  |  |  |  |  |  |  | (3,141)
Ending balance at Dec. 31, 2015 | 353,727 |  |  |  |  |  |  |  | 180,000 |  |  | 213 | 305,008 |  |  | (180,091) |  |  |  |  |  |  | (1,802) | 303,328 |  |  |  |  |  |  |  | 50,399 |  |
Issuance of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued pursuant to dividend reinvestment plan | 10,311 |  |  |  |  |  |  |  |  |  |  | 2 | 10,309 |  |  |  |  |  |  |  |  |  |  | 10,311 |  |  |  |  |  |  |  |  |  |
Shares issued due to exercise of employee stock options and issuance of directors' deferred stock | 12,856 |  |  |  |  |  |  |  |  |  |  | 2 | 12,854 |  |  |  |  |  |  |  |  |  |  | 12,856 |  |  |  |  |  |  |  |  |  |
Issuance of partnership units pursuant to dividend reinvestment plan | 6,910 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,910 |  |
Net income | 56,720 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45,279 |  |  |  |  |  |  |  | 45,279 |  |  |  |  |  |  |  | 11,441 |  |
Change in unrealized loss on cash flow hedge | 678 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 503 | 503 |  |  |  |  |  |  |  | 175 |  |
Preferred stock distributions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock distributions |  |  |  |  | $ (9,282) | $ (3,093) |  |  |  |  |  |  |  |  |  |  |  |  | $ (9,282) | $ (3,093) |  |  |  |  |  |  |  | $ (9,282) | $ (3,093) |  |  |  |  |
Common stock distributions |  | $ (40,720) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (30,328) |  |  |  |  |  |  |  | $ (30,328) |  |  |  |  |  |  |  | $ (10,392) |
Distributions payable common stock and distributions payable partnership units |  |  | $ (14,858) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (11,069) |  |  |  |  |  |  |  | $ (11,069) |  |  |  |  |  |  |  | $ (3,789)
Ending balance at Dec. 31, 2016 | $ 373,249 |  |  |  |  |  |  |  | $ 180,000 |  |  | $ 217 | $ 328,171 |  |  | $ (188,584) |  |  |  |  |  |  | $ (1,299) | $ 318,505 |  |  |  |  |  |  |  | $ 54,744 |  |

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