Stock-Based Compensation - Summary Stock Options Outstanding and Exercisable (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options outstanding (in shares) | shares	206,524
Options outstanding, weighted average remaining contractual life	3 years 5 months 1 day
Weighted average exercise price (in dollars per share)	$ 48.88
Options exercisable (in shares) | shares	197,576
Options exercisable, weighted average exercise price (in dollars per share)	$ 47.20
$12.21 - $12.21
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	12.21
Exercise price range, upper limit (in dollars per share)	$ 12.21
Options outstanding (in shares) | shares	77,400
Options outstanding, weighted average remaining contractual life	5 days
Weighted average exercise price (in dollars per share)	$ 12.21
Options exercisable (in shares) | shares	77,400
Options exercisable, weighted average exercise price (in dollars per share)	$ 12.21
$38.40 - $38.40
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	38.40
Exercise price range, upper limit (in dollars per share)	$ 38.40
Options outstanding (in shares) | shares	8,085
Options outstanding, weighted average remaining contractual life	3 years 1 month 20 days
Weighted average exercise price (in dollars per share)	$ 38.40
Options exercisable (in shares) | shares	8,085
Options exercisable, weighted average exercise price (in dollars per share)	$ 38.40
$47.50 - $47.50
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	47.50
Exercise price range, upper limit (in dollars per share)	$ 47.50
Options outstanding (in shares) | shares	9,800
Options outstanding, weighted average remaining contractual life	4 years 1 month 17 days
Weighted average exercise price (in dollars per share)	$ 47.50
Options exercisable (in shares) | shares	9,800
Options exercisable, weighted average exercise price (in dollars per share)	$ 47.50
$65.36 - $65.36
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	65.36
Exercise price range, upper limit (in dollars per share)	$ 65.36
Options outstanding (in shares) | shares	15,647
Options outstanding, weighted average remaining contractual life	5 years 1 month 24 days
Weighted average exercise price (in dollars per share)	$ 65.36
Options exercisable (in shares) | shares	15,647
Options exercisable, weighted average exercise price (in dollars per share)	$ 65.36
$65.45 - $65.45
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	65.45
Exercise price range, upper limit (in dollars per share)	$ 65.45
Options outstanding (in shares) | shares	11,960
Options outstanding, weighted average remaining contractual life	5 years 1 month 17 days
Weighted average exercise price (in dollars per share)	$ 65.45
Options exercisable (in shares) | shares	11,960
Options exercisable, weighted average exercise price (in dollars per share)	$ 64.45
$73.52 - $73.52
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	73.52
Exercise price range, upper limit (in dollars per share)	$ 73.52
Options outstanding (in shares) | shares	50,000
Options outstanding, weighted average remaining contractual life	5 years 6 months 29 days
Weighted average exercise price (in dollars per share)	$ 73.52
Options exercisable (in shares) | shares	50,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 73.52
$85.99 - $85.99
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	85.99
Exercise price range, upper limit (in dollars per share)	$ 85.99
Options outstanding (in shares) | shares	33,632
Options outstanding, weighted average remaining contractual life	6 years 1 month 24 days
Weighted average exercise price (in dollars per share)	$ 85.99
Options exercisable (in shares) | shares	24,684
Options exercisable, weighted average exercise price (in dollars per share)	$ 85.99