Equity and Cash Incentive Program - Summary of Activity Relating to SARs Outstanding (Details) - Stock Appreciation Rights (SARs) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of shares outstanding, beginning of the period (in shares) | shares	477,950
Forfeited / expired (in shares) | shares	(7,030)
Exercised (in shares) | shares	(48,559)
Number of shares outstanding, end of the period (in shares) | shares	422,361
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Weighted average exercise price outstanding, beginning of the period (in dollars per share) | $ / shares	$ 29.43
Forfeited / expired (in dollars per share) | $ / shares	34.13
Exercised (in dollars per share) | $ / shares	25.95
Weighted average exercise price outstanding, end of the period (in dollars per share) | $ / shares	$ 29.75
Weighted average remaining contractual term, outstanding (years)	6 years 1 month 6 days
Aggregate intrinsic value | $	$ 1,799
Number of shares, exercisable (in shares) | shares	253,901
Weighted average exercise price exercisable (in dollars per share) | $ / shares	$ 26.84
Weighted average remaining contractual term, exercisable (years)	5 years 4 months 24 days
Aggregate intrinsic value, exercisable | $	$ 1,799