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Equity (Details 2) (USD $) | 3 Months Ended | 9 Months Ended |  | 1 Months Ended |  | 9 Months Ended | 3 Months Ended | 1 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 partnership | Sep. 30, 2011 | Dec. 31, 2011 | Dec. 31, 2012 Dividend distributions | Nov. 30, 2012 Dividend distributions | Oct. 31, 2012 Dividend distributions | Sep. 30, 2012 Equity Distribution Agreement | Sep. 30, 2012 Shelf Registration | Sep. 30, 2012 Total Cumulative Preferred Stock | Sep. 30, 2011 Total Cumulative Preferred Stock | Sep. 30, 2012 Series C Cumulative Convertible Preferred Stock | Sep. 30, 2011 Series C Cumulative Convertible Preferred Stock | Sep. 30, 2011 Series F Cumulative Preferred Stock | Sep. 30, 2012 Series E Cumulative Convertible Preferred 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 | Sep. 30, 2012 Common Stock | Sep. 30, 2011 Common Stock | Sep. 30, 2011 Common Stock Underwritten public offering | Sep. 30, 2012 Conversion of noncontrolling interest | Sep. 30, 2012 Conversion of noncontrolling interest item
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares outstanding | 2,000,000 |  | 2,000,000 |  | 2,000,000 |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend Rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 8.50% |  | 8.00% | 8.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock to be issued upon conversion |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share |  |  |  |  |  |  |  |  |  |  |  |  | $ 19.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total shares reserved for issuance of common stock related to the conversion of preferred stock |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of preferred stock redeemed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,536,530 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidation Value Per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.1333 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income allocated to preferred stockholders | $ 818,000 | $ 818,000 | $ 2,454,000 | $ 8,260,000 |  |  |  |  |  |  |  |  |  |  | $ 3,566,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum aggregate offering price of shares authorized for issuance |  |  |  |  |  |  |  |  | 85,686,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount available under equity distribution agreement |  |  |  |  |  |  |  |  | 64,573,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock sold (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 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 | 42,777,000 | 41,243,000 | 42,777,000 | 41,243,000 |  |  |  |  |  |  | 2,454,000 | 4,694,000 | 2,454,000 | 2,454,000 | 2,240,000 |  | 40,323,000 |  |  |  |  |  |  |  |  | 40,323,000 | 36,549,000 |  |  |
Paid |  |  | 42,777,000 | 43,011,000 |  |  |  |  |  |  | 2,454,000 | 6,462,000 | 2,454,000 | 2,454,000 | 4,008,000 |  |  |  |  |  |  |  |  |  |  | 40,323,000 | 36,549,000 |  |  |
Dividend declared per share per month |  |  |  |  |  | $ 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partnership, conversion basis |  |  | one-for-one basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of limited partners exercising conversion rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2
Number of limited partners exchanging all of their 67,294 partnership units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Number of partnership units converted by first limited partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 67,294
Number of partnership units converted by second limited partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,000
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,294 |
Number of shares reserved under limited partnership agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000 | 20,000
Partnership unit conversion price (per unit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17.00 | $ 17.00
Change from net income attributable to and transfers from non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to LTC Properties, Inc | 12,495,000 | 12,375,000 | 38,519,000 | 36,695,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfers from the non-controlling interest: Increase in paid-in capital for limited partners conversion | 56,000 |  | 56,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | 12,551,000 | 12,375,000 | 37,329,000 | 36,695,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of the partnership conversion rights | 349,000 |  | 349,000 |  | 1,962,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Market value of the partnership conversion rights | 646,000 |  | 646,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares terminated its authorization to be repurchased | 5,000,000 |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining number of shares authorized to be repurchased |  |  |  |  | 3,360,237 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of authorized common stock before amendment (in shares) | 45,000,000 |  | 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized | 60,000,000 |  | 60,000,000 |  | 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated other comprehensive income | 160,000 |  | 160,000 |  | 199,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option exercises (in shares) |  |  | 85,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total option value |  |  | 1,926,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Market value of stock options exercised |  |  | $ 2,761,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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