Exhibit 24.2

POWER OF ATTORNEY

KNOW ALL THESE PERSONS BY THESE PRESENTS, that each person whose signature appears below makes, constitutes and appoints Gregory G. Freitag his true and lawful attorney-in-fact, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all (i) amendments (including any post-effective amendments) to this Registration Statement on Form S-4 (File No. 333-175379) and (ii) registration statements and any and all amendments thereto (including post-effective amendments) for the same offering that is effective upon filing pursuant to Rule 462(b) under the Securities Act, and to file the same, with all exhibits thereto and other documents in connection therewith, with the SEC, and hereby grants to such attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute or substitutes, may do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, this Power of Attorney has been signed on the 4^th day of August, 2011, by the following:

/s/ Lowell Hellervik

Lowell Hellervik