Equity - Narrative (Details) (USD $)
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1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||
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Oct. 31, 2013
common_unit_holder
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Dec. 31, 2012
common_unit_holder
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Feb. 28, 2012
common_unit_holder
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Feb. 29, 2012
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Oct. 31, 2013
Series A Cumulative Redeemable Preferred Units Of The Operating Partnership [Member]
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Dec. 31, 2013
Series A Cumulative Redeemable Preferred Units Of The Operating Partnership [Member]
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Oct. 30, 2013
Series A Cumulative Redeemable Preferred Units Of The Operating Partnership [Member]
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Sep. 30, 2013
Series A Cumulative Redeemable Preferred Units Of The Operating Partnership [Member]
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Dec. 31, 2013
Series B Preferred Stock [Member]
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Dec. 31, 2012
Series B Preferred Stock [Member]
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Feb. 12, 2013
Common Stock [Member]
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May 03, 2012
Common Stock [Member]
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Dec. 31, 2013
Common Stock [Member]
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Dec. 31, 2012
Common Stock [Member]
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Dec. 31, 2011
Common Stock [Member]
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Dec. 31, 2012
At-the-Market [Member]
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Dec. 31, 2013
Existing and Newly Elected Board Member [Member]
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Dec. 31, 2013
Employees [Member]
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Dec. 31, 2013
2012 Outperformance Program [Member]
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Jan. 02, 2012
2012 Outperformance Program [Member]
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Dec. 31, 2013
2012 Outperformance Program [Member]
Maximum [Member]
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Dec. 31, 2013
2012 Outperformance Program [Member]
Minimum [Member]
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Jan. 02, 2013
2013 Outperformance Program [Member]
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Dec. 31, 2013
2013 Outperformance Program [Member]
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Jan. 02, 2012
2013 Outperformance Program [Member]
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Jan. 02, 2013
2013 Outperformance Program [Member]
Maximum [Member]
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Dec. 31, 2013
2013 Outperformance Program [Member]
Maximum [Member]
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Jan. 02, 2013
2013 Outperformance Program [Member]
Minimum [Member]
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Dec. 31, 2013
2013 Outperformance Program [Member]
Minimum [Member]
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Dec. 31, 2013
Change of Control [Member]
Series B Preferred Stock [Member]
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Dec. 31, 2013
Pinnacle JV [Member]
building
sqft
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Dec. 31, 2013
Pinnacle I [Member]
sqft
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Dec. 31, 2012
Pinnacle I [Member]
sqft
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Dec. 31, 2012
Pinnacle II [Member]
sqft
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Jan. 23, 2012
Public Offering [Member]
Series B Preferred Stock [Member]
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Dec. 31, 2010
Public Offering [Member]
Series B Preferred Stock [Member]
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Feb. 12, 2013
Public Offering [Member]
Common Stock [Member]
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May 18, 2012
Public Offering [Member]
Common Stock [Member]
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Jan. 23, 2012
Public Offering, Exercise of Over-allotment Option [Member]
Series B Preferred Stock [Member]
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Dec. 31, 2010
Public Offering, Exercise of Over-allotment Option [Member]
Series B Preferred Stock [Member]
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Feb. 12, 2013
Public Offering, Exercise of Over-allotment Option [Member]
Common Stock [Member]
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May 18, 2012
Public Offering, Exercise of Over-allotment Option [Member]
Common Stock [Member]
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May 18, 2012
Private Placement [Member]
Common Stock [Member]
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Dec. 31, 2013
General and Administrative Expense [Member]
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Dec. 31, 2012
General and Administrative Expense [Member]
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Dec. 31, 2013
Deferred Leasing Costs and Lease Intatngibles, Net [Member]
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Dec. 31, 2012
Deferred Leasing Costs and Lease Intatngibles, Net [Member]
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Dec. 31, 2013
Restricted Stock Units (RSUs) [Member]
2012 Outperformance Program [Member]
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Jan. 02, 2013
Restricted Stock Units (RSUs) [Member]
2013 Outperformance Program [Member]
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Dec. 31, 2013
The Company [Member]
2012 Outperformance Program [Member]
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Dec. 31, 2013
The Company [Member]
2013 Outperformance Program [Member]
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Dec. 31, 2013
SNL Equity REIT Index [Member]
2012 Outperformance Program [Member]
|
Dec. 31, 2013
SNL Equity REIT Index [Member]
2013 Outperformance Program [Member]
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Class of Stock [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Noncontrolling interest, common units outstanding (in shares) | 2,382,563 | 2,610,941 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Number of common unit holders | 1 | 1 | 1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Noncontrolling interest, decrease from redemptions or purchase of interests (in shares) | 72,500 | 155,878 | 80,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Number of buildings in property | 2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Area of real estate property | 625,640 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Ownership interest in property | 65.00% | 98.25% | 98.25% | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Business acquisition, area of real estate property (in sqft) | 393,776 | 393,776 | 231,864 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Shares outstanding of preferred stock | 419,014 | 499,014 | 419,014 | 5,800,000 | 5,800,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Interest rate of preferred stock | 6.25% | 8.375% | 8.375% | 12.375% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Liquidation preference of preferred stock (dollars per share) | $ 25 | $ 25.00 | $ 25 | $ 25 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Par value of preferred stock | $ 0.01 | $ 0.01 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Proceeds from sale of common stock (in shares) | 2,300,000 | 3,500,000 | 8,000,000 | 13,225,000 | 300,000 | 300,000 | 1,200,000 | 1,725,000 | 2,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||
Proceeds from the offering before transaction costs | $ 57,500,000 | $ 83,900,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Liquidation preference of preferred stock, per annum (dollars per share) | $ 2.0938 | $ 3.09375 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Preferred stock, redemption period after change in control | 90 days | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Public offering price (dollars per share) | $ 15.00 | $ 21.50 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Proceeds from issuance of common stock | 202,542,000 | 190,798,000 | 111,008,000 | 189,900,000 | 190,800,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Value of shares authorized | 125,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Value of shares issued | 57,500,000 | 202,542,000 | 190,798,000 | 111,008,000 | 12,600,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Conversion of convertible securities (in shares) | 72,500 | 155,878 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Common dividends declared (dollars per share) | $ 0.5 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Preferred dividends declared (dollars per share) | $ 1.5625 | $ 2.09375 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Award vesting period | 3 years | 3 years | 2 years | 2 years | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Award hold post vesting period | 2 years | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
Maximum share value authorized under plan | 10,000,000 | 11,000,000 | 11,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Performance period | 3 years | 3 years | 3 years | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Percentage Amount TSR Exceeds Simple Annual TSR | 4.00% | 4.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Simple Annual TSR | 9.00% | 9.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Percent TSR Exceeds SNL Equity REIT Index | 4.00% | 4.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Absolute TSR Reduced on a Linear Basis | 100.00% | 0.00% | 100.00% | 0.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Simple TSR Reduced on a Linear Basis | 7.00% | 0.00% | 7.00% | 0.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Percent of Underperformance of SNL Equity REIT Index | 4.00% | 4.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Underperformance of SNL Equity REIT Index per Year | 3.00% | 3.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Hypothetical bonus pool for stock settled award | 4,000,000 | 2,000,000 | 4,000,000 | 2,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Stock settled awards | 3,490,000 | 4,140,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Forfeiture adjustment as percent of total cost | 6.00% | 6.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expected volatility rate | 36.00% | 33.00% | 35.00% | 25.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Risk free interest rate | 0.40% | 0.38% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Expected dividend payment per share | $ 1.62 | $ 1.50 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Non-cash compensation expense recognized as additional paid-in capital | 6,682,000 | 4,314,000 | 2,660,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
Share-based compensation expense | $ 6,454,000 | $ 4,212,000 | $ 228,000 | $ 102,000 |