Stock Compensation Plan (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock options awarded

The following table presents information regarding Options awarded during the nine months ended September 30, 2016:

Options granted	113,935
Per share weighted average exercise price	$	58.03
Per share weighted average grant date fair value	$	13.51

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, 2016 was estimated using the Black-Scholes option valuation model with the following assumptions:

Expected term in years	5.8
Risk free interest rate	1.8	%
Volatility	32.1	%
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, 2016:

Options vested	91,022
Aggregate grant date fair value of Options vested (in millions)	$	1.2

Schedule of outstanding stock options

The following table presents information regarding outstanding Options:

	September 30, 2016		December 31, 2015
Options outstanding	546,008		526,611
Aggregate intrinsic value (in millions)	$	22.3	$	16.1
Per share weighted average exercise price	$	38.08	$	31.94
Exercisable Options	225,972		232,594
Aggregate intrinsic value (in millions)	$	11.1	$	9.0
Unvested Options	320,036		294,017
Per share weighted average grant date fair value	$	12.44	$	12.09