Percentage of LTIP Units Allowable to be Converted, Percentage

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Automatic Grant

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercise Price

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Performance Period

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Periodic Vesting Percentage

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Return Percentage Threshold

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Allocated as a Percentage of Shares Authorized

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Percentage of Benchmark

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Percentage of Benchmark, Potential Share Commitment

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Percentage of Benchmark, Shares Committed Annually

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Value of Benchmark

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Awarded as a Percentage of Maximum

+ References

No definition available.

+ Details

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- Definition

Number of common shares reserved for future issuance related to deferred compensation arrangements with individuals.

+ References

No definition available.

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(e)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(d)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(d)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Number of shares reserved for issuance under non-option equity instrument agreements awarded that validly exist and are outstanding, including vested instruments.

+ References

+ Details

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

+ References

No definition available.

+ Details

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

+ References

No definition available.

+ Details

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

+ References

No definition available.

+ Details

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- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

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- Definition

Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

+ References

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Share-Based Compensation (Details) (USD $)	12 Months Ended		27 Months Ended	12 Months Ended			1 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	1 Months Ended	12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended				12 Months Ended			0 Months Ended	36 Months Ended					25 Months Ended
Share-Based Compensation (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012 Common Stock	Dec. 31, 2011 Common Stock	Dec. 31, 2012 Stock Options [Member] Stock Option Plan [Member]	Dec. 31, 2010 Restricted Stock [Member] Equity Plan [Member]	Dec. 31, 2011 Restricted Stock [Member] Equity Plan [Member]	Dec. 31, 2012 Restricted Stock [Member] Equity Plan [Member]	Sep. 30, 2012 Restricted Stock [Member] Equity Plan [Member] Manager [Member]	Feb. 28, 2013 Restricted Stock [Member] Equity Plan [Member] ARC Properties Advisors, LLC [Member] Manager [Member]	Dec. 31, 2012 Restricted Stock [Member] Equity Plan [Member] ARC Properties Advisors, LLC [Member] Manager [Member]	Dec. 31, 2012 Restricted Stock [Member] Restricted Share Plan [Member]	Sep. 30, 2012 Restricted Stock [Member] Director Stock Plan [Member]	Dec. 31, 2012 Restricted Common Stock [Member] Equity Plan [Member]	Dec. 31, 2011 Restricted Common Stock [Member] Equity Plan [Member]	Dec. 31, 2010 Restricted Common Stock [Member] Equity Plan [Member]	Dec. 31, 2012 Restricted Common Stock [Member] Director Stock Plan [Member]	Dec. 31, 2011 Restricted Common Stock [Member] Director Stock Plan [Member]	Dec. 31, 2010 Restricted Common Stock [Member] Director Stock Plan [Member]	Dec. 31, 2012 Restricted Unvested Common Stock [Member] Equity Plan [Member]	Dec. 31, 2011 Restricted Unvested Common Stock [Member] Equity Plan [Member]	Sep. 30, 2012 Restricted Unvested Common Stock [Member] Equity Plan [Member]	Dec. 31, 2010 Restricted Unvested Common Stock [Member] Equity Plan [Member]	Dec. 31, 2012 Restricted Unvested Common Stock [Member] Director Stock Plan [Member]	Dec. 31, 2011 Restricted Unvested Common Stock [Member] Director Stock Plan [Member]	Dec. 31, 2010 Restricted Unvested Common Stock [Member] Director Stock Plan [Member]	Feb. 28, 2013 Performance Shares [Member] Outperformance Plan [Member]	Dec. 15, 2015 Performance Shares [Member] Outperformance Plan [Member]	Mar. 31, 2013 Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Equity Market Capitalization [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Stockholder's Book Equity [Member] Performance Shares [Member]	Feb. 28, 2013 Maximum [Member] Equity Market Capitalization [Member] Performance Shares [Member] Outperformance Plan [Member]	Jan. 30, 2018 OP Units [Member] Outperformance Plan [Member]	Feb. 28, 2013 Absolute Component [Member] Excess Return, Above Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Absolute Component [Member] Maximum [Member] Excess Return, Above Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component [Member] Excess Return, Above Peer Group [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component [Member] Cumulative Return, Above Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component [Member] Cumulative Return, Equal to Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component [Member] Cumulative Return, Below Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component [Member] Minimum [Member] Cumulative Return, Above Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component [Member] Maximum [Member] Cumulative Return, Above Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component, Linear Interpolation [Member] Minimum [Member] Cumulative Return, Equal to Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]	Feb. 28, 2013 Relative Component, Linear Interpolation [Member] Maximum [Member] Cumulative Return, Above Threshold [Member] Performance Shares [Member] Outperformance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Awarded as a Percentage of Maximum																																						100.00%	50.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Return Percentage Threshold																																			0.00%	21.00%			0.00%		6.00%	18.00%	0.00%	6.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercise Price						$ 10.00
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized						500,000.0
Share-based Compensation Arrangement by Share-based Payment Award, Periodic Vesting Percentage													20.00%	20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number														27,930	259,909	167,400	0	30,300	14,700	0		153,450	186,403	0		14,700	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price															$ 11.84	$ 12.50	$ 0.00	$ 10.68	$ 11.50	$ 0.00	$ 11.62	$ 12.50		$ 0.00	$ 10.58	$ 11.50	$ 0.00
Shares issued in lieu of cash for services, in shares				3,457	3,563						325,000	167,400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Automatic Grant													3,000
Restricted share vesting period	5 years
Share-based compensation	$ 1,224,000	$ 225,000	$ 0				$ 100,000	$ 200,000	$ 1,200,000
Maximum authorized amount as a percentage of shares authorized										10.00%
Number of shares authorized, in shares														99,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period															93,683	167,400		23,250	14,700		93,683	167,400			23,250	14,700		8,241,101
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price															$ 10.65	$ 12.50			$ 11.50		$ 10.65	$ 12.50			$ 10.45	$ 11.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period															(1,174)			(7,650)			(1,174)				(7,650)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price															$ 10.65			$ 11.54			$ 10.65				$ 11.54
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period																					(59,556)	(13,950)			(2,370)	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value																					$ 12.42	$ 12.50			$ 11.88	$ 0.00
Stock Issued During Period, Value, Issued for Services				33,000	34,000
Share-based Compensation Arrangement by Share-based Payment Award, Performance Period																													3 years
Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Percentage of Benchmark, Shares Committed Annually																																	1.25%
Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Percentage of Benchmark																															5.00%				4.00%		4.00%
Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Value of Benchmark																																$ 2,100,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Authorized, Percentage of Benchmark, Potential Share Commitment																																	3.00%
Share-based Compensation Arrangement by Share-based Payment Award, Shares Allocated as a Percentage of Shares Authorized																														100.00%
Percentage of Shares Allowable to be Converted, Percentage																																		33.30%