Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares

The following is a reconciliation between basic and diluted weighted average shares outstanding:

	Years Ended December 31,
	2016	2015	2014
Basic weighted average shares outstanding	71,746,000	72,420,000	72,000,000
Effect of dilution:
Stock options	13,000	148,000	225,000
Restricted shares/units	651,000	622,000	629,000
Diluted weighted average shares outstanding	72,410,000	73,190,000	72,854,000

Schedule of Stock by Class

	Shares Outstanding
	Class A  Common Stock		Class B  Common Stock
Balance at December 31, 2013	60,794,114		11,484,408
Employee and non-employee director stock transactions*	(241,441	)	—
Balance at December 31, 2014	60,552,673		11,484,408
Employee and non-employee director stock transactions*	357,158		—
Balance at December 31, 2015	60,909,831		11,484,408
Share repurchases	(4,119,558	)	—
Employee and non-employee director stock transactions*	288,766		—
Balance at December 31, 2016	57,079,039		11,484,408

*Reflects common stock activity in connection with employee stock option exercises and restricted shares granted to employees, as well as in connection with the fulfillment of employees’ statutory tax withholding obligations for applicable income and other employment taxes and forfeited employee restricted shares.