Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2016

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, 2015	$	206	$	1,447,795		$	5,270,114	$	(5,478,950	)	$	(17,333	)	$	17,333	$	1,239,165
Net income		—		—			156,979		—			—			—		156,979
Deferred compensation activity		—		—			—		—			(22	)		22		—
Purchase of common stock for treasury		—		—			—		(96,508	)		—			—		(96,508	)
Equity-based compensation		—		21,378			—		—			—			—		21,378
Excess tax benefit from equity benefit plan activity		—		8,678			—		—			—			—		8,678
Proceeds from stock options exercised		—		27,909			—		—			—			—		27,909
Treasury stock issued upon option exercise and restricted share vesting		—		(22,696	)		—		22,696			—			—		—
Balance, June 30, 2016	$	206	$	1,483,064		$	5,427,093	$	(5,552,762	)	$	(17,355	)	$	17,355	$	1,357,601