CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Accumulated Other Comprehensive (Loss) Income [Member]	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2008	$ (16,848)	$ 205,192	$ 8,390	$ 81,443	$ 152,379	$ (20,172)
Comprehensive Income:
Net Income	0	42,221	0	0	42,221	0
Other Comprehensive Income (Loss):
Unrealized Foreign Currency Translation Gain (Loss)	65	65	0	0	0	0
Unrealized Holding Gain (Loss) on Marketable Securities, Net of Deferred Taxes	222	222	0	0	0	0
Net Change in Fair Value of Derivatives, Net of Deferred Taxes	4,156	4,156	0	0	0	0
Change in Funding Status of Benefit Plans, Net of Deferred Taxes	(286)	(286)	0	0	0	0
Total Comprehensive Income		46,378
Compensation Expense - restricted stock (net of forfeited shares)	0	1,840	94	1,746	0	0
Common Stock Dividends	0	(14,479)	0	0	(14,479)	0
Balance at Dec. 31, 2009	(12,691)	238,931	8,484	83,189	180,121	(20,172)
Comprehensive Income:
Net Income	0	15,302	0	0	15,302	0
Other Comprehensive Income (Loss):
Unrealized Foreign Currency Translation Gain (Loss)	111	111	0	0	0	0
Unrealized Holding Gain (Loss) on Marketable Securities, Net of Deferred Taxes	133	133	0	0	0	0
Net Change in Fair Value of Derivatives, Net of Deferred Taxes	(1,856)	(1,856)	0	0	0	0
Change in Funding Status of Benefit Plans, Net of Deferred Taxes	(3,495)	(3,495)	0	0	0	0
Total Comprehensive Income		10,195
Compensation Expense - restricted stock (net of forfeited shares)	0	1,737	80	1,657	0	0
Repurchase of Common Stock	0	(5,231)	0	0	0	(5,231)
Common Stock Dividends	0	(11,882)	0	0	(11,882)	0
Balance at Dec. 31, 2010	(17,798)	233,750	8,564	84,846	183,541	(25,403)
Comprehensive Income:
Net Income	0	31,549	0	0	31,549	0
Other Comprehensive Income (Loss):
Unrealized Foreign Currency Translation Gain (Loss)	(247)	(247)	0	0	0	0
Unrealized Holding Gain (Loss) on Marketable Securities, Net of Deferred Taxes	(5)	(5)	0	0	0	0
Net Change in Fair Value of Derivatives, Net of Deferred Taxes	261	261	0	0	0	0
Change in Funding Status of Benefit Plans, Net of Deferred Taxes	(5,998)	(5,998)	0	0	0	0
Total Comprehensive Income		25,560
Compensation Expense - restricted stock (net of forfeited shares)	0	1,026	42	984	0	0
Common Stock Dividends	0	(10,981)	0	0	(10,981)	0
Balance at Dec. 31, 2011	$ (23,787)	$ 249,355	$ 8,606	$ 85,830	$ 204,109	$ (25,403)