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Equity and Noncontrolling Interest Equity Weighted Average Shares Outstanding (Tables)
12 Months Ended
Dec. 31, 2020
Noncontrolling Interest [Abstract]  
Schedule of Weighted Average Number of Shares
Per share data for net income (basic and diluted) is computed using weighted average shares of common stock. Convertible limited partnership units and employee stock options are the Company’s potentially dilutive securities. For all periods presented, the convertible limited partnership units are anti-dilutive. The treasury stock method was used to measure the effect of the dilution.
 
 December 31,
(Shares in thousands)202020192018
Weighted average common shares outstanding - Basic23,356 23,009 22,383 
Effect of dilutive options44 42 
Weighted average common shares outstanding - Diluted23,357 23,053 22,425 
Average share price$33.84 $53.41 $52.50 
Non-dilutive options 1,439 633 492 
Years non-dilutive options were issued2014 through 20202016, 2017 and 20192015, 2016 and 2017