Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

	Years Ended December 31,
	2013	2012	2011
Basic weighted average shares outstanding	71,543,000	70,374,000	69,283,000
Effect of dilution:
Stock options	286,000	783,000	510,000
Restricted shares/units	874,000	1,079,000	938,000
Diluted weighted average shares outstanding	72,703,000	72,236,000	70,731,000

Schedule of Stock by Class [Table Text Block]

	Shares Outstanding
	Class A  Common Stock		Class B  Common Stock
Balance at June 30, 2011 (date of Distribution)	57,813,267		13,534,408
Employee and non-employee director stock transactions*	621,437		—
Balance at December 31, 2011	58,434,704		13,534,408
Conversion of Class B common stock to Class A common stock	1,750,000		(1,750,000	)
Employee and non-employee director stock transactions*	406,326		—
Balance at December 31, 2012	60,591,030		11,784,408
Conversion of Class B common stock to Class A common stock	300,000		(300,000	)
Employee and non-employee director stock transactions*	(96,916	)	—
Balance at December 31, 2013	60,794,114		11,484,408

*Primarily includes issuances of common stock in connection with employee stock option exercises and restricted shares granted to employees, partially offset by shares acquired by the Company in connection with the fulfillment of employees’ statutory tax withholding obligations for applicable income and other employment taxes and forfeited employee restricted shares.