Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2018

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, 2017	$	206	$	1,644,197		$	6,231,940	$	(6,270,851	)	$	(17,383	)	$	17,383	$	1,605,492
Cumulative-effect adjustment from adoption of ASU 2014-09, net of tax	—		—			2,196		—			—			—		2,196
Net income	—		—			166,049		—			—			—		166,049
Deferred compensation activity	—		—			—		—			(6		)	6		—
Purchase of common stock for treasury	—		—			—		(357,242		)	—			—		(357,242		)
Equity-based compensation	—		9,509			—		—			—			—		9,509
Proceeds from stock options exercised	—		40,804			—		—			—			—		40,804
Treasury stock issued upon option exercise and restricted share vesting	—		(16,410		)	—		16,410			—			—		—
Balance, March 31, 2018	$	206	$	1,678,100		$	6,400,185	$	(6,611,683	)	$	(17,389	)	$	17,389	$	1,466,808