Shareholders' Deficit (Notes)	12 Months Ended
Dec. 31, 2014
Shareholders' Deficit [Abstract]
Shareholders' Deficit	Shareholders’ Deficit As detailed in Note 4 on April 16, 2014, the Company and Mr. Haslam agreed to terminate the Unit Purchase Agreement. In full satisfaction of the Company's outstanding obligation under the Unit Purchase Agreement, the Company transferred back to Mr. Haslam 1,218 StreetLinks membership units, which represents the portion of the membership units attributable to the $3.9 million in unpaid installment payments and $0.2 million in interest remaining under the Unit Purchase Agreement. In accordance with the relevant accounting guidance, the termination of the Unit Purchase Agreement and simultaneous transfer of ownership interests was treated as an equity transaction, increasing additional paid-in capital and StreetLinks' noncontrolling interest by approximately $3.8 million and $0.1 million, respectively, with no corresponding gain or loss recognized in the condensed consolidated statement of operations. In connection with the Company's issuance of convertible preferred stock in 2007, which was subsequently exchanged for shares of newly-issued common stock in 2011, the Company accrued an estimate for offering costs incurred by the preferred stock investors. In accordance with the relevant accounting guidance, the Company originally recorded these costs to additional paid-in capital as a reduction of the proceeds from issuance. As the statute of limitations whereby the investors may claim the expenses lapsed during 2013, the Company adjusted the estimated accrued offering costs, resulting in a $1.8 million increase to additional paid-in capital. The Company’s Board of Directors has approved the repurchase of up to 9.0 million shares of the Company’s common stock. No shares were repurchased during 2014 or 2013. Prior to 2013, the Company has repurchased 8.0 million shares, leaving approximately 1.0 million of shares that may yet be purchased under the repurchase plan. Under Maryland law, shares repurchased under the repurchase plan are to be returned to the Company’s authorized but unissued shares of common stock. Common stock purchased under the repurchase plan is charged against additional paid-in capital. The Company maintains a stock compensation plan. The aggregate value and expense associated with the grants under the plan is not material to the Company's consolidated statements. Noncontrolling Interests. During 2013, the Company distributed approximately $0.8 million of excess capital, as determined in accordance with the StreetLinks operating agreement, to the noncontrolling members of StreetLinks. Each member's share of the distribution is determined based on their ownership interest at the time of the distribution. During the second quarter of 2013, the Company foreclosed on the membership interests of the noncontrolling members in full satisfaction of Advent's outstanding intercompany debt obligations. In accordance with the relevant accounting guidance, this debt extinguishment was treated as an equity transaction, reducing Advent's noncontrolling interest deficit by approximately $1.9 million. The remaining activity attributable to acquisitions of noncontrolling interests relates primarily to the additional Corvisa ownership interests acquired during the fourth quarter. See Note 4 to the consolidated financial statements for additional information regarding these transactions. The remaining noncontrolling interest activity for 2013 represents the deconsolidation of the Logistics segment. Upon the lapse of the warranty period for the final Logistics segment moves performed during the first quarter, the Company wrote-off the remaining equity balances of the Logistics segment. On a consolidated basis, this write-off resulted in a reduction of the Logistics segment's noncontrolling interest deficit of $0.5 million and a corresponding loss on deconsolidation, which is reflected in Other Income on the consolidated statements of operations.

Shareholders’ Deficit

As detailed in Note 4 on April 16, 2014, the Company and Mr. Haslam agreed to terminate the Unit Purchase Agreement. In full satisfaction of the Company's outstanding obligation under the Unit Purchase Agreement, the Company transferred back to Mr. Haslam 1,218 StreetLinks membership units, which represents the portion of the membership units attributable to the $3.9 million in unpaid installment payments and $0.2 million in interest remaining under the Unit Purchase Agreement. In accordance with the relevant accounting guidance, the termination of the Unit Purchase Agreement and simultaneous transfer of ownership interests was treated as an equity transaction, increasing additional paid-in capital and StreetLinks' noncontrolling interest by approximately $3.8 million and $0.1 million, respectively, with no corresponding gain or loss recognized in the condensed consolidated statement of operations.

In connection with the Company's issuance of convertible preferred stock in 2007, which was subsequently exchanged for shares of newly-issued common stock in 2011, the Company accrued an estimate for offering costs incurred by the preferred stock investors. In accordance with the relevant accounting guidance, the Company originally recorded these costs to additional paid-in capital as a reduction of the proceeds from issuance. As the statute of limitations whereby the investors may claim the expenses lapsed during 2013, the Company adjusted the estimated accrued offering costs, resulting in a $1.8 million increase to additional paid-in capital.

The Company’s Board of Directors has approved the repurchase of up to 9.0 million shares of the Company’s common stock. No shares were repurchased during 2014 or 2013. Prior to 2013, the Company has repurchased 8.0 million shares, leaving approximately 1.0 million of shares that may yet be purchased under the repurchase plan. Under Maryland law, shares repurchased under the repurchase plan are to be returned to the Company’s authorized but unissued shares of common stock. Common stock purchased under the repurchase plan is charged against additional paid-in capital.

The Company maintains a stock compensation plan. The aggregate value and expense associated with the grants under the plan is not material to the Company's consolidated statements.

Noncontrolling Interests. During 2013, the Company distributed approximately $0.8 million of excess capital, as determined in accordance with the StreetLinks operating agreement, to the noncontrolling members of StreetLinks. Each member's share of the distribution is determined based on their ownership interest at the time of the distribution.

During the second quarter of 2013, the Company foreclosed on the membership interests of the noncontrolling members in full satisfaction of Advent's outstanding intercompany debt obligations. In accordance with the relevant accounting guidance, this debt extinguishment was treated as an equity transaction, reducing Advent's noncontrolling interest deficit by approximately $1.9 million. The remaining activity attributable to acquisitions of noncontrolling interests relates primarily to the additional Corvisa ownership interests acquired during the fourth quarter. See Note 4 to the consolidated financial statements for additional information regarding these transactions.

The remaining noncontrolling interest activity for 2013 represents the deconsolidation of the Logistics segment. Upon the lapse of the warranty period for the final Logistics segment moves performed during the first quarter, the Company wrote-off the remaining equity balances of the Logistics segment. On a consolidated basis, this write-off resulted in a reduction of the Logistics segment's noncontrolling interest deficit of $0.5 million and a corresponding loss on deconsolidation, which is reflected in Other Income on the consolidated statements of operations.