Preferred and Common Stock	3 Months Ended
Mar. 31, 2014
Stockholders' Equity Note [Abstract]
Preferred and Common Stock	Preferred and Common Stock Series D and Series E Preferred Stock On September 16, 2013, the Company’s board of directors unanimously approved the issuance of Series D Cumulative Convertible Preferred Stock (“Series D Preferred Stock”) and the issuance of Series E Cumulative Preferred Stock (“Series E Preferred Stock”). On September 15, 2013, the Company entered into definitive purchase agreements pursuant to which it agreed to issue Series D Preferred Stock, par value $0.01 per share, and common stock, par value $0.01 per share, to certain institutional holders promptly following the close of the Company’s merger with CapLease, via a private placement. Pursuant to the definitive purchase agreements, the Company issued approximately 21.7 million shares of Series D Preferred Stock and 15.1 million shares of common stock, for gross proceeds of $288.0 million and $186.0 million, respectively, on November 8, 2013. The Series D Preferred Stock will pay dividends at the rate of 5.81% per annum on its face amount of $13.59 per share (equivalent to $0.79 per share on an annualized basis). The Series D Preferred Stock is redeemable by the Company on August 31, 2014 (the “Redemption Date”). Subsequent to that date, or in certain other circumstances, the Series D Preferred Stock is convertible into common stock or Series E Preferred Stock or redeemable into cash, at the discretion of the Company upon such request for conversion by the holders of Series D Preferred Stock. In the event of a liquidation, the holders of Series D Preferred Stock are entitled to receive the greater of (a) $13.59 per share plus accrued and unpaid dividends (the “Liquidation Preference”) plus a 20% premium and (b) an amount the Series D Preferred Stock holders would have received had they converted into shares of common stock immediately prior to the liquidation event. If the Company elects to redeem the Series D Preferred Stock on the Redemption Date, the Company shall pay the greater of (a) the product of the number of Series D Preferred Stock and the 102% of the Liquidation Preference and (b) the product of the shares of common stock that would be issued if the Series D Preferred Stock converted immediately prior to the Redemption Date and 102% of the one-day value-weighted average price (“VWAP”) of the common stock. At any time after the Redemption Date, the holders of Series D Preferred Stock may convert some or all of their outstanding Series D Preferred Stock into shares of common stock. Upon such an election to convert, the Company may elect the following settlement options (1) convert the shares of Series D Preferred Stock into the number of fully paid and non-assessable common stock obtained by dividing the aggregate Liquidation Preference of such Series D Preferred Stock by the Conversion Price, as defined below, (2) convert the shares of Series D Preferred Stock into an equal number of shares of Series E Preferred Stock, additional shares of Series E Preferred Stock may be issued under certain circumstances, or (3) an amount equal to the product of the number of shares of Series D Preferred Stock and the Cash Conversion Price, as defined below. The Conversion Price shall be the lowest of (i) a 2% discount to the VWAP of the common stock for the 10 Trading Days prior to the Conversion Election Date, (ii) a 2% discount to the closing price on the Conversion Election Date and (iii) $13.59. The Cash Conversion Price shall be the greater of (i) 102% of the Liquidation Preference and (ii) the one day VWAP of the common stock on the date of the election. The Company has concluded that the conversion option qualifies as a derivative and should be bifurcated from the host instrument. At issuance, the conversion option had a fair value of $18.7 million. As of March 31, 2014, the fair value of the conversion option had a fair value of $26.7 million, compared to a fair value of $16.7 million as of December 31, 2013. The Company recorded the change in fair value of $10.0 million in loss on derivative instruments, net in the consolidated statements of operations for the three months ended March 31, 2014. As the holders of Series D Preferred Stock are entitled to receive liquidation preferences that other equity holders are not entitled to, the Company determined the Series D Preferred Stock meets the definition of a deemed liquidation event and therefore should be classified as temporary equity under U.S. GAAP. At the date of issuance, the fair value of the Series D Preferred Stock was $269.3 million. As of March 31, 2014, the Company has determined that a liquidation event is not probable; therefore, the Company has concluded that the Series D Preferred Stock is not currently redeemable or likely to become redeemable. As such, the Company has not accreted the initial value of the Series D Preferred Stock. As of March 31, 2014, there were 21,735,008 authorized and issued shares of Series D Preferred Stock and no authorized and issued shares of Series E Preferred Stock, respectively. Series F Preferred Stock On October 6, 2013, in connection with the modification to the ARCT IV Merger, the Company’s board of directors unanimously approved the issuance of Series F Preferred Stock. Upon consummation of the ARCT IV Merger on January 3, 2014, 42.2 million shares of Series F Preferred Stock were issued to ARCT IV shareholders and issued 0.7 million units of Series F OP Units to the ARCT IV OP Unit holders. Subsequent to original issuance and through March 31, 2014, 455,372 Series F OP Unit were converted to an equivalent number of Series F Preferred Stock. As of March 31, 2014, there were 42,654,919 shares of Series F Preferred Stock and 266,093 Series F OP Units issued and outstanding. The Series F Preferred Stock will pay cumulative cash dividends at the rate of 6.70% per annum on its liquidation preference of $25.00 per share (equivalent to $1.675 per share on an annual basis). The Series F Preferred Stock will not be redeemable by the Company before the fifth anniversary of the date on which such Series F Preferred Stock is issued (the “Initial Redemption Date”), except under circumstances intended to preserve the Company’s status as a real estate investment trust for federal and/or state income tax purposes and except upon the occurrence of a change of control. On and after the Initial Redemption Date, the Company may, at its option, redeem shares of the Series F Preferred Stock, in whole or from time to time in part, at a redemption price of $25.00 per share plus, subject to exceptions, any accrued and unpaid dividends thereon to the date fixed for redemption. The shares of Series F Preferred Stock have no stated maturity, are not subject to any sinking fund or mandatory redemption and will remain outstanding indefinitely unless the Company redeems or otherwise repurchases them or they become convertible and are converted into common stock (or, if applicable, alternative consideration). The Series F Preferred Stock trades on the NASDAQ under the symbol “ARCPP”. Increases in Authorized Common Stock On December 9, 2013, the Company filed articles of amendment to its charter to increase the number of authorized shares of common stock to 1.5 billion shares. Offerings On August 1, 2012, the Company filed a $500 million universal shelf registration statement and a resale registration statement with the SEC. Each registration statement became effective on August 17, 2012. As of March 31, 2014, the Company had issued 2.1 million shares of common stock under the $500 million universal shelf registration statement. No preferred stock, debt or equity-linked security had been issued under this $500 million universal shelf registration statement. The resale registration statement, as amended, registers the resale of up to 1,882,248 shares of common stock issued in connection with any future conversion of certain currently outstanding restricted shares, convertible preferred stock or limited partnership interests in the OP. In January 2013, the Company commenced its “at the market” equity offering program (“ATM”) in which it may from time to time offer and sell shares of its common stock having aggregate offering proceeds of up to $60.0 million. The shares will be issued pursuant to the Company’s $500.0 million universal shelf registration statement. On March 14, 2013, the Company filed a universal automatic shelf registration statement that was automatically declared effective and achieved well-known seasoned issuer (“WKSI”) status. The Company intends to maintain both the $500 million universal shelf registration statement and the WKSI universal automatic shelf registration statement. Dividends In October 2011, the Company began paying dividends on the fifteenth day of each month to stockholders of record on the eighth day of such month. On October 23, 2013, the board of directors of the Company authorized an annualized dividend per share of $1.00, effective February 10, 2014. The per share annualized dividend of $1.00 reflects an increase of $0.06 per share from an annualized dividend of $0.94 per share. The annualized dividend rate at March 31, 2014 was $1.00 per share. Common Stock Repurchases On August 20, 2013, the Company’s board of directors reauthorized its $250.0 million share repurchase program, which was originally authorized in February 2013. During the three months ended March 31, 2014, the Company did not repurchase any shares of common stock under the share repurchase program. Upon the closing of the ARCT III Merger, on February 28, 2013, 29.2 million shares, or 16.5% of the then-outstanding shares of ARCT III’s common stock, were paid in cash at $12.00 per share, which is equivalent to 27.7 million shares of the Company’s common stock based on the ARCT III Exchange Ratio. In addition, 148.1 million shares of ARCT III’s common stock were converted to shares of the Company’s common stock at the ARCT III Exchange Ratio, resulting in an additional 140.7 million shares of the Company’s common stock outstanding after the exchange.

Preferred and Common Stock

Series D and Series E Preferred Stock

On September 16, 2013, the Company’s board of directors unanimously approved the issuance of Series D Cumulative Convertible Preferred Stock (“Series D Preferred Stock”) and the issuance of Series E Cumulative Preferred Stock (“Series E Preferred Stock”).

On September 15, 2013, the Company entered into definitive purchase agreements pursuant to which it agreed to issue Series D Preferred Stock, par value $0.01 per share, and common stock, par value $0.01 per share, to certain institutional holders promptly following the close of the Company’s merger with CapLease, via a private placement. Pursuant to the definitive purchase agreements, the Company issued approximately 21.7 million shares of Series D Preferred Stock and 15.1 million shares of common stock, for gross proceeds of $288.0 million and $186.0 million, respectively, on November 8, 2013. The Series D Preferred Stock will pay dividends at the rate of 5.81% per annum on its face amount of $13.59 per share (equivalent to $0.79 per share on an annualized basis). The Series D Preferred Stock is redeemable by the Company on August 31, 2014 (the “Redemption Date”). Subsequent to that date, or in certain other circumstances, the Series D Preferred Stock is convertible into common stock or Series E Preferred Stock or redeemable into cash, at the discretion of the Company upon such request for conversion by the holders of Series D Preferred Stock.

In the event of a liquidation, the holders of Series D Preferred Stock are entitled to receive the greater of (a) $13.59 per share plus accrued and unpaid dividends (the “Liquidation Preference”) plus a 20% premium and (b) an amount the Series D Preferred Stock holders would have received had they converted into shares of common stock immediately prior to the liquidation event.

If the Company elects to redeem the Series D Preferred Stock on the Redemption Date, the Company shall pay the greater of (a) the product of the number of Series D Preferred Stock and the 102% of the Liquidation Preference and (b) the product of the shares of common stock that would be issued if the Series D Preferred Stock converted immediately prior to the Redemption Date and 102% of the one-day value-weighted average price (“VWAP”) of the common stock.

At any time after the Redemption Date, the holders of Series D Preferred Stock may convert some or all of their outstanding Series D Preferred Stock into shares of common stock. Upon such an election to convert, the Company may elect the following settlement options (1) convert the shares of Series D Preferred Stock into the number of fully paid and non-assessable common stock obtained by dividing the aggregate Liquidation Preference of such Series D Preferred Stock by the Conversion Price, as defined below, (2) convert the shares of Series D Preferred Stock into an equal number of shares of Series E Preferred Stock, additional shares of Series E Preferred Stock may be issued under certain circumstances, or (3) an amount equal to the product of the number of shares of Series D Preferred Stock and the Cash Conversion Price, as defined below.

The Conversion Price shall be the lowest of (i) a 2% discount to the VWAP of the common stock for the 10 Trading Days prior to the Conversion Election Date, (ii) a 2% discount to the closing price on the Conversion Election Date and (iii) $13.59. The Cash Conversion Price shall be the greater of (i) 102% of the Liquidation Preference and (ii) the one day VWAP of the common stock on the date of the election.

The Company has concluded that the conversion option qualifies as a derivative and should be bifurcated from the host instrument. At issuance, the conversion option had a fair value of $18.7 million. As of March 31, 2014, the fair value of the conversion option had a fair value of $26.7 million, compared to a fair value of $16.7 million as of December 31, 2013. The Company recorded the change in fair value of $10.0 million in loss on derivative instruments, net in the consolidated statements of operations for the three months ended March 31, 2014.

As the holders of Series D Preferred Stock are entitled to receive liquidation preferences that other equity holders are not entitled to, the Company determined the Series D Preferred Stock meets the definition of a deemed liquidation event and therefore should be classified as temporary equity under U.S. GAAP. At the date of issuance, the fair value of the Series D Preferred Stock was $269.3 million. As of March 31, 2014, the Company has determined that a liquidation event is not probable; therefore, the Company has concluded that the Series D Preferred Stock is not currently redeemable or likely to become redeemable. As such, the Company has not accreted the initial value of the Series D Preferred Stock.

As of March 31, 2014, there were 21,735,008 authorized and issued shares of Series D Preferred Stock and no authorized and issued shares of Series E Preferred Stock, respectively.

Series F Preferred Stock

On October 6, 2013, in connection with the modification to the ARCT IV Merger, the Company’s board of directors unanimously approved the issuance of Series F Preferred Stock. Upon consummation of the ARCT IV Merger on January 3, 2014, 42.2 million shares of Series F Preferred Stock were issued to ARCT IV shareholders and issued 0.7 million units of Series F OP Units to the ARCT IV OP Unit holders. Subsequent to original issuance and through March 31, 2014, 455,372 Series F OP Unit were converted to an equivalent number of Series F Preferred Stock. As of March 31, 2014, there were 42,654,919 shares of Series F Preferred Stock and 266,093 Series F OP Units issued and outstanding.

The Series F Preferred Stock will pay cumulative cash dividends at the rate of 6.70% per annum on its liquidation preference of $25.00 per share (equivalent to $1.675 per share on an annual basis). The Series F Preferred Stock will not be redeemable by the Company before the fifth anniversary of the date on which such Series F Preferred Stock is issued (the “Initial Redemption Date”), except under circumstances intended to preserve the Company’s status as a real estate investment trust for federal and/or state income tax purposes and except upon the occurrence of a change of control. On and after the Initial Redemption Date, the Company may, at its option, redeem shares of the Series F Preferred Stock, in whole or from time to time in part, at a redemption price of $25.00 per share plus, subject to exceptions, any accrued and unpaid dividends thereon to the date fixed for redemption. The shares of Series F Preferred Stock have no stated maturity, are not subject to any sinking fund or mandatory redemption and will remain outstanding indefinitely unless the Company redeems or otherwise repurchases them or they become convertible and are converted into common stock (or, if applicable, alternative consideration). The Series F Preferred Stock trades on the NASDAQ under the symbol “ARCPP”.

Increases in Authorized Common Stock

On December 9, 2013, the Company filed articles of amendment to its charter to increase the number of authorized shares of common stock to 1.5 billion shares.

Offerings

On August 1, 2012, the Company filed a $500 million universal shelf registration statement and a resale registration statement with the SEC. Each registration statement became effective on August 17, 2012. As of March 31, 2014, the Company had issued 2.1 million shares of common stock under the $500 million universal shelf registration statement. No preferred stock, debt or equity-linked security had been issued under this $500 million universal shelf registration statement. The resale registration statement, as amended, registers the resale of up to 1,882,248 shares of common stock issued in connection with any future conversion of certain currently outstanding restricted shares, convertible preferred stock or limited partnership interests in the OP.

In January 2013, the Company commenced its “at the market” equity offering program (“ATM”) in which it may from time to time offer and sell shares of its common stock having aggregate offering proceeds of up to $60.0 million. The shares will be issued pursuant to the Company’s $500.0 million universal shelf registration statement.

On March 14, 2013, the Company filed a universal automatic shelf registration statement that was automatically declared effective and achieved well-known seasoned issuer (“WKSI”) status. The Company intends to maintain both the $500 million universal shelf registration statement and the WKSI universal automatic shelf registration statement.

Dividends

In October 2011, the Company began paying dividends on the fifteenth day of each month to stockholders of record on the eighth day of such month. On October 23, 2013, the board of directors of the Company authorized an annualized dividend per share of $1.00, effective February 10, 2014. The per share annualized dividend of $1.00 reflects an increase of $0.06 per share from an annualized dividend of $0.94 per share. The annualized dividend rate at March 31, 2014 was $1.00 per share.

Common Stock Repurchases

On August 20, 2013, the Company’s board of directors reauthorized its $250.0 million share repurchase program, which was originally authorized in February 2013. During the three months ended March 31, 2014, the Company did not repurchase any shares of common stock under the share repurchase program.

Upon the closing of the ARCT III Merger, on February 28, 2013, 29.2 million shares, or 16.5% of the then-outstanding shares of ARCT III’s common stock, were paid in cash at $12.00 per share, which is equivalent to 27.7 million shares of the Company’s common stock based on the ARCT III Exchange Ratio. In addition, 148.1 million shares of ARCT III’s common stock were converted to shares of the Company’s common stock at the ARCT III Exchange Ratio, resulting in an additional 140.7 million shares of the Company’s common stock outstanding after the exchange.