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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Valuation allowance after adoption of ASC 326 $ 73,048 [1] $ 61,408
Valuation allowance before adoption of ASC 326 [1]   $ 61,408
Common stock, shares authorized (in shares) 90,000,000 90,000,000
Common stock, no par value (in dollars per share) $ 0 $ 0
Common stock, shares issued (in shares) 25,775,133 25,713,408
Common stock, shares outstanding (in shares) 25,299,178 25,239,748
Treasury stock, at cost (in shares) 475,955 473,660
[1] Beginning January 1, 2021 calculation is based on the current expected credit loss methodology. Prior to January 1, 2021 calculation was based on the incurred loss methodology.