Stock Compensation Plan (Tables)

9 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of stock options awarded

The following table presents information regarding Options awarded during the nine months ended September 30, 2019: 

Options granted	1,272
Per share weighted average exercise price	$	66.59
Per share weighted average grant date fair value	$	10.32

Schedule of assumptions used to determine the grant date fair value of options granted

The weighted-average grant date fair value for Options granted during the nine months ended September 30, 2019 was estimated using the Black-Scholes option valuation model with the following assumptions: 

Expected term in years	5.0
Risk free interest rate	1.8	%
Volatility	23.1	%
Dividend yield	3.0	%

Schedule of stock options vested during the period

The following table presents information regarding Options that vested during the nine months ended September 30, 2019: 

Options vested	111,615
Aggregate grant date fair value of Options vested (in millions)	$	1.6

Schedule of outstanding stock options

The following table presents information regarding outstanding Options:

	September 30, 2019		December 31, 2018
Options outstanding	432,406		451,081
Aggregate intrinsic value (in millions)	$	3.2	$	2.7
Per share weighted average exercise price	$	69.31	$	67.46
Exercisable Options	333,887		240,903
Aggregate intrinsic value (in millions)	$	3.2	$	2.6
Unvested Options	98,519		210,178
Per share weighted average grant date fair value	$	14.37	$	14.21