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Equity (Details) (USD $) | 3 Months Ended | 12 Months Ended | 1 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 partnership | Dec. 31, 2011 partnership | Dec. 31, 2010 | Mar. 31, 2013 Dividend distributions | Feb. 28, 2013 Dividend distributions | Jan. 31, 2013 Dividend distributions | Dec. 31, 2012 Equity Distribution Agreement | Dec. 31, 2012 Shelf Registration | Dec. 31, 2012 Total Cumulative Preferred Stock | Dec. 31, 2011 Total Cumulative Preferred Stock | Dec. 31, 2012 Series C Cumulative Convertible Preferred Stock | Dec. 31, 2011 Series C Cumulative Convertible Preferred Stock | Dec. 31, 2011 Series F Cumulative Preferred Stock | Dec. 31, 2010 Series F Cumulative Preferred Stock | Dec. 31, 2012 Common Stock | Nov. 30, 2012 Common Stock | Oct. 31, 2012 Common Stock | Sep. 30, 2012 Common Stock | Aug. 31, 2012 Common Stock | Jul. 31, 2012 Common Stock | Jun. 30, 2012 Common Stock | May 31, 2012 Common Stock | Apr. 30, 2012 Common Stock | Mar. 31, 2012 Common Stock | Feb. 29, 2012 Common Stock | Jan. 31, 2012 Common Stock | Dec. 31, 2012 Common Stock | Dec. 31, 2011 Common Stock | Dec. 31, 2011 Common Stock Underwritten public offering | Dec. 31, 2012 Conversion of noncontrolling interest item | Dec. 31, 2010 Series E Preferred Stock
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares outstanding | 2,000,000 |  |  |  | 2,000,000 |  |  |  | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued upon conversion (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65,790
Number of shares of preferred stock elected to be converted to common shares (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,895
Dividend Rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.50% | 8.50% | 8.00% | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.50%
Number of shares of common stock and dividends to be issued upon conversion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12.50
Total shares reserved for issuance of common stock related to the conversion of preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of preferred stock redeemed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,536,530 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.1333 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.4191
Income allocated to preferred stockholders |  |  |  |  |  |  |  |  | $ 3,273,000 | $ 9,078,000 | $ 16,045,000 |  |  |  |  |  |  |  |  |  | $ 3,566,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000
Maximum aggregate offering price of shares authorized for issuance |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85,686,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount available under equity distribution agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 64,573,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares common stock sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,990,000 |  |
Sale price of common stock (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 27.25 |  |
Net proceeds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 103,631,000 |  |
Amount available under effective shelf registration statement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 167,614,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum offering capacity under shelf registration statement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Declared | 57,785,000 |  |  |  | 54,804,000 |  |  |  | 57,785,000 | 54,804,000 |  |  |  |  |  |  | 3,273,000 | 5,512,000 | 3,273,000 | 3,272,000 | 2,240,000 |  | 54,512,000 |  |  |  |  |  |  |  |  |  |  |  | 54,512,000 | 49,292,000 |  |  |
Paid |  |  |  |  |  |  |  |  | 57,785,000 | 56,572,000 | 53,902,000 |  |  |  |  |  | 3,273,000 | 7,280,000 | 3,273,000 | 3,272,000 | 4,008,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 54,512,000 | 49,292,000 |  |  |
Dividend declared per share per month | $ 0.465 | $ 0.455 | $ 0.435 | $ 0.435 | $ 0.42 | $ 0.42 | $ 0.42 | $ 0.42 |  |  |  | $ 0.155 | $ 0.155 | $ 0.155 |  |  |  |  |  |  |  |  | $ 0.155 | $ 0.155 | $ 0.155 | $ 0.155 | $ 0.155 | $ 0.145 | $ 0.145 | $ 0.145 | $ 0.145 | $ 0.145 | $ 0.145 | $ 0.145 |  | $ 0.14 |  |  |
Non-controlling Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of limited partnerships |  |  |  |  |  |  |  |  | 1 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partnership, conversion basis |  |  |  |  |  |  |  |  | one-for-one basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of limited partners exercising conversion rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |
Redemption notification of limited partnership units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89,294 |
Cash paid, redemption of non-controlling interest |  |  |  |  |  |  |  |  | 2,764,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,764,000 |
Margin added to the common stock price per share on redemption date to determine amount to be paid to limited partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.05 |
Excess of redemption value over the book value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,246,000 |
Number of partnership units converted by limited partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 112,588 |
Number of partnership units converted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,294 |
Partnership unit conversion price (per unit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17.00 |
Change from net income attributable to and transfers from non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to LTC Properties, Inc |  |  |  |  |  |  |  |  | 51,290,000 | 49,252,000 | 45,862,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfers from the non-controlling interest: Increase in paid-in capital for limited partners conversion |  |  |  |  |  |  |  |  | 396,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfers from the non-controlling interest: Decrease in paid-in capital for limited partners conversion |  |  |  |  |  |  |  |  | (1,246,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change from net income attributable to LTC Properties, Inc. and transfers from non-controlling interest |  |  |  |  |  |  |  |  | 50,440,000 | 49,252,000 | 45,862,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized to be repurchased | 5,000,000 |  |  |  | 3,360,237 |  |  |  | 5,000,000 | 3,360,237 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of authorized shares of common stock before amendment | 45,000,000 |  |  |  |  |  |  |  | 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized | 60,000,000 |  |  |  | 45,000,000 |  |  |  | 60,000,000 | 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive income | $ 152,000 |  |  |  | $ 199,000 |  |  |  | $ 152,000 | $ 199,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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