. the fair value of the company 2019s interest reflected the pennymac stock price at december 31 , 2017 and 2016 , respectively ( a level 1 input ) . the fair value of the company 2019s interest in the non-public units held of pennymac is based on the stock price of the pennymac public securities at december 31 , 2017 and 2016 . 12 . borrowings short-term borrowings 2017 revolving credit facility . the company 2019s credit facility has an aggregate commitment amount of $ 4