Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Weighted-Average Shares Outstanding

A reconciliation of basic and diluted weighted-average shares outstanding is as follows:

	Three Months Ended September 30,		Nine Months Ended   September 30,
	2018	2017	2018	2017
Basic weighted average shares outstanding	112,587,623	115,921,134	113,366,465	116,772,652
Weighted average dilutive options outstanding	2,386,831	2,521,815	2,418,281	2,540,955
Diluted weighted average shares outstanding	114,974,454	118,442,949	115,784,746	119,313,607
Antidilutive shares	1,375,186	—	1,097,439	1,174,469