Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Schedule of Earnings per Share

Earnings per share is computed as follows:

	Three Months Ended September 30,												Nine Months Ended September 30,
	2015						2014						2015						2014
	Net Income		Shares		Per Share Amount		Net Income		Shares		Per Share Amount		Net Income		Shares		Per Share Amount		Net Income		Shares		Per Share Amount
Basic earnings per share	$	97,950		86,006	$	1.14	$	87,176		86,715	$	1.01	$	60,161		86,096	$	0.70	$	75,365		87,329	$	0.86
Effect of dilutive incentive-based awards				94						309						111						319
Diluted earnings per share	$	97,950		86,100	$	1.14	$	87,176		87,024	$	1.00	$	60,161		86,207	$	0.70	$	75,365		87,648	$	0.86