Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Summary of Changes in Shareholders' Equity

A summary of changes in shareholders’ equity is presented below:

	Common Stock		Additional Paid-In Capital			Retained Earnings		Treasury Stock			Deferred Compensation Trust			Deferred Compensation Liability		Total
Balance, December 31, 2014	$	206	$	1,325,495		$	4,887,187	$	(5,088,633	)	$	(17,333	)	$	17,333	$	1,124,255
Net income		—		—			248,923		—			—			—		248,923
Purchase of common stock for treasury		—		—			—		(263,446	)		—			—		(263,446	)
Equity-based compensation		—		39,874			—		—			—			—		39,874
Tax benefit from equity benefit plan   activity		—		14,465			—		—			—			—		14,465
Proceeds from stock options exercised		—		76,419			—		—			—			—		76,419
Treasury stock issued upon option   exercise and restricted share vesting		—		(36,039	)		—		36,039			—			—		—
Balance, September 30, 2015	$	206	$	1,420,214		$	5,136,110	$	(5,316,040	)	$	(17,333	)	$	17,333	$	1,240,490