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Stockholder's Equity (Narrative) (Details) (USD $) | 0 Months Ended | 3 Months Ended |  | 3 Months Ended |  | 0 Months Ended | 12 Months Ended | 3 Months Ended |  | 3 Months Ended
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Jul. 11, 2013 | Feb. 19, 2013 | Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Series A Preferred Stock [Member] | Mar. 31, 2014 LTIP [Member] | Mar. 31, 2013 LTIP [Member] | Mar. 31, 2014 2010 Equity Incentive Plan [Member] | May 07, 2013 Unresitricted Stock [Member] 2010 Equity Incentive Plan [Member] | Dec. 31, 2013 Unresitricted Stock [Member] 2010 Equity Incentive Plan [Member] | Mar. 31, 2014 Restricted Stock [Member] | Mar. 31, 2013 Restricted Stock [Member] | Dec. 31, 2013 Restricted Stock [Member] | Mar. 31, 2014 Maximum [Member] | Mar. 31, 2014 Maximum [Member] 2010 Equity Incentive Plan [Member] | Mar. 31, 2014 Minimum [Member] 2010 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  | 400,000,000 | 400,000,000 |  |  |  | 455,000 |  |  |  |  |  |  |  |
Common stock, par value |  |  | $ 0.01 | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares |  |  | 100,000,000 | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value |  |  | $ 0.01 | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |
Common stock aggregate offering price |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |
Preferred stock, shares issued |  |  | 1,840,000 | 1,840,000 |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares outstanding |  |  | 1,840,000 | 1,840,000 |  |  |  |  |  |  |  |  |  |  |  |
Public follow-on offering of common stock shares |  |  | 25,028,649 | 24,990,120 |  |  |  |  |  |  |  |  |  |  |  |
Offering price per share of common stock | $ 18.25 | $ 16.60 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares sold to executive and senior officers and members of the board of directors | 43,250 | 90,325 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Underwriting discount and offering costs | 5,000,000 | 4,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, net of issuance costs | 99,900,000 | 90,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment on outstanding borrowings | 6,500,000 | 65,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding |  |  | 25,028,649 | 24,990,120 |  |  |  |  |  |  |  |  |  |  |  |
Non-vested restricted stock awards |  |  | 157,357 | 156,568 |  |  |  |  |  |  | 157,357 |  | 156,568 |  |  |
Unrestricted common stock granted, shares |  |  | 51,146 |  |  |  |  |  | 15,793 |  |  |  |  |  |  |
Granted, Weighted Average Grant Date Fair Value |  |  | $ 18.38 |  |  |  |  |  | $ 19.00 |  |  |  |  |  | $ 20.00 | $ 14.20
Compensation costs |  |  |  |  |  | 300,000 | 200,000 |  |  | 300,000 | 300,000 | 200,000 |  |  |  |
Public offering shares | 5,750,000 | 5,750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Type of preferred stock completed public offering |  |  |  |  | 7.75% Series A Cumulative Redeemable Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Dividend rate |  |  |  |  | 7.75% |  |  |  |  |  |  |  |  |  |  |
Redemption date of Series A Preferred Stock |  |  |  |  | Jul. 19, 2017 |  |  |  |  |  |  |  |  |  |  |
Redemption price of Series A Preferred Stock |  |  |  |  | $ 25.00 |  |  |  |  |  |  |  |  |  |  |
Remaining balance of shares available |  |  |  |  |  |  |  | 70,980 |  |  |  |  |  |  |  |
Fair value of the restricted stock granted |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period for the restricted stock |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation costs related to restricted stock issuances |  |  | $ 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining weighted average period |  |  |  |  |  |  |  |  |  |  | 3 years 4 months 24 days |  |  |  |  |

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