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Share-based Compensation and Other Employment Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense recognized for 2021, 2020, and 2019 is presented in the following table by its classification within total non-interest expense.
Years Ended December 31,
(in thousands)202120202019
Salaries and other personnel expense$26,957 $17,827 $19,618 
Merger-related expense — 4,219 
Other operating expense838 814 650 
Total share-based compensation expense included in non-interest expense$27,795 $18,641 $24,487 
Schedule of Measuring Compensation Expense The estimated fair value of the converted stock options was determined using a Hull-White model in a binomial lattice option pricing framework with the following weighted average assumptions:
2019
Stock price (Synovus' closing stock price on December 31, 2018)$31.99 
Weighted average fair value of converted stock options11.50 
Risk-free interest rate2.51 %
Expected stock price volatility26.4 %
Dividend yield3.13 %
Term to expiration5.1 years
The fair value of market restricted share units granted was estimated on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:
202120202019
Risk-free interest rate2.87 %1.42 %2.40 %
Expected stock price volatility 56.1 25.4 24.4 
Simulation period2.9 years3.0 years3.0 years
Schedule of Stock Options Activity
A summary of stock option activity and changes during the years ended December 31, 2021, 2020, and 2019 is presented below.
Stock Options
202120202019
(in thousands, except per share data)QuantityWeighted-Average Exercise PriceQuantityWeighted-Average Exercise PriceQuantityWeighted-Average Exercise Price
Outstanding at beginning of year2,401 $22.47 3,037 $22.74 640 $16.93 
Assumed in acquisition  — — 3,230 23.22 
Options exercised(923)22.07 (572)22.67 (820)19.91 
Options forfeited/expired/canceled  (64)33.50 (13)34.23 
Options outstanding at end of year1,478 $22.71 2,401 $22.47 3,037 $22.74 
Options exercisable at end of year1,478 $22.71 2,401 $22.47 2,399 $19.52 
Schedule of Restricted Stock Units Activity
A summary of restricted share units and market/performance share units outstanding and changes during the years ended December 31, 2021, 2020, and 2019 is presented below.
Restricted Share UnitsMarket/Performance Share Units
(in thousands, except per share data)QuantityWeighted-Average Grant Date Fair ValueQuantityWeighted-Average Grant Date Fair Value
Outstanding at December 31, 2018526 $41.18 392 $39.62 
Granted573 36.27 305 37.22 
Assumed in acquisition136 31.99 — — 
Vested(304)37.04 (152)30.87 
Forfeited(114)37.04 (50)39.45 
Outstanding at December 31, 2019817 38.32 495 40.85 
Granted822 32.42 204 37.74 
Vested(384)38.04 (214)41.31 
Forfeited(34)35.97 (46)39.03 
Outstanding at December 31, 20201,221 34.50 439 39.37 
Granted599 42.31 141 42.94 
Vested(482)37.05 (58)42.43 
Forfeited(93)31.41   
Outstanding at December 31, 20211,245 $37.00 522 $37.59