Income Taxes (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Deferred tax liabilities:
Deferred sales commissions	$ (7,861,000)	$ (7,880,000)
Property and equipment	(13,240,000)	(10,489,000)
Benefit plans	(9,617,000)	(5,651,000)
Identifiable intangible assets	(8,523,000)	(8,449,000)
Unrealized gains on investment securities		(2,002,000)
Purchase of fund assets	(6,631,000)	(5,793,000)
Prepaid expenses	(2,596,000)	(1,600,000)
Other		(22,000)
Total gross deferred liabilities	(48,468,000)	(41,886,000)
Deferred tax assets:
Acquisition lease liability	1,135,000	1,308,000
Additional pension and postretirement liability	26,403,000	13,171,000
Accrued expenses	13,438,000	12,120,000
Unrealized losses on investment securities	2,329,000	1,375,000
Capital loss carryforwards	3,022,000	3,631,000
Nonvested stock	19,051,000	14,974,000
Unused state tax credits	1,123,000	1,131,000
State net operating loss carryforwards	6,055,000	5,464,000
Other	4,012,000	2,838,000
Total gross deferred assets	76,568,000	56,012,000
Net deferred tax asset	16,726,000	5,893,000
Other net deferred tax assets being capital in nature	2,600,000
Other net deferred tax liabilities being capital in nature		600,000
State tax credit carryforwards that will expire between 2019 and 2021 if not utilized	800,000
State tax credit carryforwards that will expire in 2027 if not utilized	300,000
Valuation allowance
Valuation allowance	11,374,000	8,233,000
Increase in the valuation allowance recorded as an increase to accumulated other comprehensive loss	(2,955,000)	963,000
Capital loss carryforward
Valuation allowance
Valuation allowance	5,600,000	3,000,000
Release of valuation allowance against deferred tax assets that are capital in nature	(2,600,000)
Portion of release of valuation allowance , recorded as a reduction of tax expense	400,000
Increase in the valuation allowance recorded as an increase to accumulated other comprehensive loss	3,000,000
Net operating loss carryforwards
Valuation allowance
Valuation allowance	$ 5,800,000	$ 5,200,000