Equity and Noncontrolling Interest - Per Share Data (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Weighted average common shares outstanding - basic (in shares)	23,009	22,383	21,901
Effect of dilutive options (in shares)	44	42	107
Weighted average common shares outstanding - diluted (in shares)	23,053	22,425	22,008
Average share price (in usd per share)	$ 53.41	$ 52.50	$ 61.63
Options
Class of Stock [Line Items]
Non-dilutive options (in shares)	633	492	0