Equity - Earnings Per Share (EPS) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Weighted average number of shares outstanding:
Common stock (in shares)	20,864,470	20,732,767	20,849,325	20,719,900
Common stock equivalents-stock options, grants (in shares)	30,003	128,334	43,951	125,940
Diluted shares outstanding (in shares)	20,894,473	20,861,101	20,893,276	20,845,840