Equity and Noncontrolling Interest - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Equity Class Of Treasury Stock [Line Items]
Common Stock Par Value	$ 1	$ 1
Common Stock Shares Authorized	30,000,000	30,000,000
Common Stock Shares, Issued	17,850,616	17,735,162
Shares issued for equity based comp plans	49,906
Shares issued for ESPP	0
Shares issued for Options exercise and Other activity	65,548
Preferred Stock Shares Authorized	10,000,000
Preferred Stock Par Or Stated Value Per Share	$ 1
2015 Share Repurchase [Member]
Equity Class Of Treasury Stock [Line Items]
Stock Repurchase Program Authorized Amount	$ 100.0
Stock Repurchase Program Remaining Authorize	$ 86.9