Stockholders' Investment

12 Months Ended

Dec. 31, 2012

Equity [Abstract]

Stockholders' investment

 Stockholders’ Investment

Common Stock

Common stock has voting rights — one vote for each share of common stock. Class A common stock had voting rights and Class B common stock did not have voting rights. All classes of common stock participate equally in earnings and dividends. All common stock is subject to a Shareholders’ Agreement which includes restrictions on transferability and “piggyback” registration rights. Such agreement provides that if, at any time after an initial public offering, the Company files a registration statement under the Securities Act of 1933, as amended, for any underwritten sale of shares of any of the Company’s equity securities, the stockholders may request that the Company include in such registration the shares of common stock held by them on the same terms and conditions as the securities otherwise being sold in such registration.

In addition to piggyback registration rights discussed above, certain of the Company’s stockholders have demand registration rights. In March 2007, the Company entered into a second amended and restated stockholders’ agreement, pursuant to which certain of the Company’s stockholders were granted Form S-3 registration rights. The second amended and restated stockholders’ agreement provides that, any time after the Company is eligible to register its common stock on a Form S-3 registration statement under the Securities Act, certain of the Company’s stockholders may request registration under the Securities Act of all or any portion of their shares of common stock. These stockholders are limited to a total of two of such registrations. In addition, if the Company proposes to file a registration statement under the Securities Act for any underwritten sale of shares of any of its securities, stockholders party to the second amended and restated stockholders’ agreement may request that the Company include in such registration the shares of common stock held by them on the same terms and conditions as the securities otherwise being sold in such registration.

The Shareholder’s Agreement defines certain circumstances, including a change in control, whereby all stockholders are obligated to sell their common stock on the same terms as Thayer Equity Investors V, L.P., the majority shareholder of the Company and an affiliate of HCI Equity Management L.P. (HCI).

In December 2012, the Company issued and sold 3.4 million shares of its common stock at a public offering price of $17.25 per share for an aggregate offering proceeds of $55.3 million, net of $3.4 million of underwriting discounts and commissions. In connection with the public offering, the Company incurred additional expenses of $0.3 million. Additionally, the Company granted the underwriters an option to purchase up to 525,000 additional shares at the public offering price less the underwriting discount to cover any over-allotments. The underwriters exercised this option subsequent to year end as discussed in Note 15.

Warrants to Acquire Common Stock

In connection with a business combination entered in 2007, the Company issued to existing Sargent Transportation Group, Inc. stockholders warrants to acquire 2,269,263 shares of Class A common stock at an exercise price of $13.39 per share. The warrants are exercisable at the option of the holder any time prior to March 13, 2017. No warrants were exercised during the years ended December 31, 2012 or 2011.

On December 11, 2009, in connection with financing of the Bullet acquisition, the Company issued warrants to acquire 1,746,971 shares of Class A common stock at an exercise price of $8.37 per share. The warrants are exercisable at the option of the holder any time prior to December 11, 2017. The $3 million fair value of the warrants at the date of issuance has been reflected as a component of additional paid-in capital in stockholders’ investment in the accompanying consolidated balance sheets. Certain holders exercised 44,794 and 554,328 warrants during the years ended December 31, 2012 and 2011, respectively.