( 1 ) on september 14 , 2012 , the company entered into a lease agreement for 186000 square feet of rentable space located in an office facility in canonsburg , pennsylvania , which serves as the company's headquarters . the lease was effective as of september 14 , 2012 , but because the leased premises were under construction , the company was not obligated to pay rent until three months following the date that the leased premises were delivered to ansys , which occurred on october 1 , 2014