Condensed Consolidated Statements of Equity (USD $)		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 2012		$ 539,910,000	$ 555,000	$ 517,688,000	$ 136,293,000	$ (116,840,000)	$ 2,214,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		(8,337,000)			(8,337,000)
Net loss attributable to noncontrolling interests		0
Net loss, continuing operations		(8,337,000)
Changes in defined benefit pension plans		3,135,000				3,135,000
Changes in fair value of derivative		494,000				494,000
Compensation plans: 4,980,097 net shares issued in 2013 and 1,779,404 in 2014	[1]	39,348,000	50,000	39,298,000
Repurchase 4,816,228 Class A Common shares in 2013 and 1,181,560 Class A Common shares in 2014		(69,313,000)	(48,000)	(52,501,000)	(16,764,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2013		505,237,000	557,000	504,485,000	111,192,000	(113,211,000)	2,214,000
Balance at Dec. 31, 2013		547,737,000	560,000	509,243,000	116,893,000	(80,923,000)	1,964,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		(5,188,000)			(5,188,000)
Net loss attributable to noncontrolling interests		(302,000)					(302,000)
Net loss, continuing operations		(5,490,000)
Changes in defined benefit pension plans		1,329,000				1,329,000
Changes in fair value of derivative		177,000				177,000
Compensation plans: 4,980,097 net shares issued in 2013 and 1,779,404 in 2014	[1]	14,335,000	18,000	14,317,000
Repurchase 4,816,228 Class A Common shares in 2013 and 1,181,560 Class A Common shares in 2014		(21,237,000)	(12,000)	(12,496,000)	(8,729,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2014		$ 536,851,000	$ 566,000	$ 511,064,000	$ 102,976,000	$ (79,417,000)	$ 1,662,000

[1] * Net of tax payments related to shares withheld for vested stock and RSUs of $4,035 in 2014 and $6,157 in 2013.