Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Common Class A [Member] Common Stock [Member] Restricted Stock [Member] 2007 Incentive Plan [Member]	Common Class A [Member] Common Stock [Member] USD ($)	Common Class A [Member] Treasury Stock [Member] USD ($)	Common Stock [Member] Restricted Stock [Member] 2007 Incentive Plan [Member]	Common Stock [Member] Employee Stock Option [Member] 2007 Incentive Plan [Member] USD ($)	Common Stock [Member] 401(k) Plan [Member] USD ($)	Common Stock [Member] USD ($)	Retained Earnings [Member] USD ($)	Treasury Stock [Member] Restricted Stock [Member] 2007 Incentive Plan [Member] USD ($)	Treasury Stock [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Restricted Stock [Member] 2007 Incentive Plan [Member] USD ($)	Restricted Stock [Member] USD ($)	Employee Stock Option [Member] 2007 Incentive Plan [Member] USD ($)	401(k) Plan [Member] USD ($)	Total USD ($)
Balance at Dec. 31, 2011		$ 15,321	$ (22,398)				$ 479,869	$ (293,322)		$ (40,115)	$ (16,402)					$ 122,953
Balance (in Shares) at Dec. 31, 2011		7,331,574	(1,578,554)				56,057,070			(4,654,750)
Net income								28,129								28,129
Adjustment to pension liability, net of income tax											(3,768)					(3,768)
Preferred stock dividends (including accretion of original issuance costs)								(4,095)								(4,095)
Issuance of common stock:
Issuance of common stock						26			(188)			(188)			26	26
Issuance of common stock (in Shares)				432,396		14,293			(84,712)							14,293
Share-based compensation							878						400			878
Balance at Dec. 31, 2012		15,321	(22,398)				480,773	(269,288)		(40,303)	(20,170)					143,935
Balance (in Shares) at Dec. 31, 2012		7,331,574	(1,578,554)				56,503,759			(4,739,462)
Net income								18,288								18,288
Adjustment to pension liability, net of income tax											9,761					9,761
Issuance of common stock:
Issuance of common stock					280	28			(256)			(256)		280	28	28
Issuance of common stock (in Shares)				382,062	119,822	5,235			(29,463)							5,235
Share-based compensation							1,974									1,974
Balance at Dec. 31, 2013		15,321	(22,398)				483,055	(251,000)		(40,559)	(10,409)					174,010
Balance (in Shares) at Dec. 31, 2013		7,331,574	(1,578,554)				57,010,878			(4,768,925)
Net income								48,061								48,061
Adjustment to pension liability, net of income tax											(10,403)					(10,403)
Issuance of common stock:
Issuance of common stock						25			(513)			(513)			25	25
Issuance of common stock (in Shares)	236,294			312,961		2,341			(45,791)							2,341
Share-based compensation		1,775					3,237									5,012
Balance at Dec. 31, 2014		$ 17,096	$ (22,398)				$ 486,317	$ (202,939)		$ (41,072)	$ (20,812)					$ 216,192
Balance (in Shares) at Dec. 31, 2014		7,567,868	(1,578,554)				57,326,180			(4,814,716)