Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Summary Of Significant Accounting Policies [Abstract]

Net Income Per Common Share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Weighted average common shares and equivalents
outstanding:
Basic weighted average common
shares outstanding		173,975		173,715		173,933		173,560
Net effect of dilutive stock options -
based on treasury stock method		373		525		307		568
Diluted weighted average common
shares outstanding		174,348		174,240		174,240		174,128