Consolidated Statements of Equity - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 2012		$ 539,910	$ 555	$ 517,688	$ 136,293	$ (116,840)	$ 2,214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		(474)			(474)
Net (loss) income		(724)					(250)
Changes in defined benefit pension plans		35,811				35,811
Change in fair value of derivative		291				291
Repurchase of Class A Common shares		(74,199)	(51)	(55,222)	(18,926)
Compensation plans: net share issued	[1]	46,833	56	46,777	0
Other		(185)				(185)
Balance at Dec. 31, 2013		547,737	560	509,243	116,893	(80,923)	1,964
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		10,529			10,529
Net (loss) income		10,222					(307)
Changes in defined benefit pension plans		(45,500)				(45,500)
Change in fair value of derivative		239				239
Repurchase of Class A Common shares		(21,237)	(12)	(12,496)	(8,729)
Compensation plans: net share issued	[1]	20,160	22	20,138
Excess tax expense of compensation plans	[1]	8,571		8,571
Other		(259)				(259)
Balance at Dec. 31, 2014		519,933	570	525,456	118,693	(126,443)	1,657
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		(82,477)
Net (loss) income		(82,477)					0
Changes in defined benefit pension plans		33,825				33,825
Change in fair value of derivative		237				237
Dividends		(59,523)
Stock Issued During Period, Value, Acquisitions		636,000	263	635,737
Stockholders' Equity Note, Spinoff Transaction		(142,842)			(143,511)	2,326	(1,657)
Repurchase of Class A Common shares		(16,222)	(8)	(8,994)	(7,220)
Compensation plans: net share issued	[1]	11,799	13	11,786
Other		253				253
Balance at Dec. 31, 2015		$ 900,983	$ 838	$ 1,163,985	$ (174,038)	$ (89,802)	$ 0

[1] * Net of tax payments related to shares withheld for vested stock and RSUs of $5,237 in 2015, $4,261 in 2014 and $6,270 in 2013.