Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 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		—		—			65,303		—			—			—		65,303
Deferred compensation activity		—		—			—		—			(10	)		10		—
Purchase of common stock for treasury		—		—			—		(87,101	)		—			—		(87,101	)
Equity-based compensation		—		10,549			—		—			—			—		10,549
Excess tax benefit from equity benefit plan activity		—		6,284			—		—			—			—		6,284
Proceeds from stock options exercised		—		22,263			—		—			—			—		22,263
Treasury stock issued upon option exercise and restricted share vesting		—		(19,891	)		—		19,891			—			—		—
Balance, March 31, 2016	$	206	$	1,467,000		$	5,335,417	$	(5,546,160	)	$	(17,343	)	$	17,343	$	1,256,463