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Stock-based compensation (Tables)
 12 Months Ended
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Changes in Restricted Stock Units
The following table summarizes information about the changes in restricted stock units as of and for the year ended December 31, 2020:
 
 Restricted Stock
Units
Outstanding		Weighted
Average Grant
Date
Fair Value
Balance at beginning of period826,263 $23.76 
Granted(1)
420,521 31.35 
Vested(177,581)31.64 
Forfeited(22,132)33.20 
Balance at end of period1,047,071 $26.06 
(1) Includes 118,776 restricted stock units issued in replacement of those initially granted by Franklin. See Note 2, "Mergers and acquisitions" for additional information.