Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Balance	$ 735,237	$ 286,991	$ 396,528	$ 293,763
Net income	4,354	35,963	103,924
Merger transaction	434,186
Repurchase of securities		(145,000)
Change in pension and postretirement, net of tax	6,655	(500)	(1,159)
Exercise of stock options	2,613
Stock-based compensation	493
Other	(4)
Performance Accelerated Restricted Stock Plan (PARS) [Member] | Common Stock [Member] | Voting Common Stock [Member]
Performance accelerated restricted stock	(51)
Performance Accelerated Restricted Stock Plan (PARS) [Member]
Performance accelerated restricted stock	(51)
Common Stock [Member] | Voting Common Stock [Member]
Balance	557,754	133,000	270,511	257,213
Merger transaction	421,703
Conversion of common stock		5,301	13,298
Repurchase of securities		(142,812)
Exercise of stock options	2,613
Stock-based compensation	493
Other	(4)
Common Stock [Member] | Nonvoting Common Stock [Member]
Balance	12,483		7,489	20,787
Merger transaction	12,483
Conversion of common stock		(5,301)	(13,298)
Repurchase of securities		(2,188)
Accumulated Other Comprehensive Income (Loss) [Member]
Balance	5,668	(987)	(487)	672
Change in pension and postretirement, net of tax	6,655	(500)	(1,159)
Retained Earnings [Member]
Balance	161,076	154,936	119,015	15,091
Net income	6,140	35,921	103,924
Noncontrolling Interest [Member]
Balance	(1,744)	42
Net income	$ (1,786)	$ 42