CONSOLIDATED STATEMENT OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total USD ($)	Additional Paid-In Capital USD ($)	Accumulated Deficit USD ($)	Accumulated Other Comprehensive Loss USD ($)	Noncontrolling Interests USD ($)	Class A Common Stock	Class A Common Stock Common Stock USD ($)	Class B Common Stock	Class B Common Stock Common Stock USD ($)
BALANCE at Dec. 31, 2012	$ (100,053)	$ 600,928	$ (713,697)	$ (4,993)	$ 16,897		$ 523		$ 289
BALANCE (in shares) at Dec. 31, 2012							52,332,012		28,933,859
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(26,972)		(26,972)
Issuance of common stock, net of issuance costs	472,400	472,220					180
Issuance of common stock, net of issuance costs (in shares)							18,000,000
Class B Common Stock converted into Class A Common Stock							27		(27)
Class B Common Stock converted into Class A Common Stock (in shares)							2,670,600		2,670,600
Class A Common Stock issued pursuant to employee benefit plans	8,017	8,012					5
Class A Common Stock issued pursuant to employee benefit plans (in shares)							538,828
Tax benefit on share based awards	471	471
Distributions to noncontrolling interests	(9,714)				(9,714)
Class A Common Stock sold by variable interest entity, net of taxes	7,008	7,008
Amortization of net periodic pension benefit costs, net of taxes	(78)			(78)
Net income	34,929		34,823		106
BALANCE at Jun. 30, 2013	386,008	1,088,639	(705,846)	(5,071)	7,289		735		262
BALANCE (in shares) at Jun. 30, 2013							73,541,440		26,263,259
BALANCE at Dec. 31, 2013	405,704	1,094,918	(696,996)	(2,553)	9,334		741		260
BALANCE (in shares) at Dec. 31, 2013						74,145,569	74,145,569	26,028,357	26,028,357
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(29,284)		(29,284)
Repurchases of Class A Common Stock	(82,371)	(82,342)					(29)
Repurchases of Class A Common Stock (in shares)	(2,900,000)						(2,910,106)
Class A Common Stock issued pursuant to employee benefit plans	7,525	7,523					2
Class A Common Stock issued pursuant to employee benefit plans (in shares)							155,182
Tax benefit on share based awards	1,361	1,361
Distributions to noncontrolling interests	(2,704)				(2,704)
Other comprehensive income	684			684
Amortization of net periodic pension benefit costs, net of taxes	80
Net income	69,258		68,493		765
BALANCE at Jun. 30, 2014	$ 370,173	$ 1,021,460	$ (657,787)	$ (1,869)	$ 7,395		$ 714		$ 260
BALANCE (in shares) at Jun. 30, 2014						71,390,645	71,390,645	26,028,357	26,028,357