Fair Value Measurements (Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 203,358	$ 196,115	$ 184,271	$ 194,394
Total gains or losses (realized /unrealized), included in earnings	(4,765)	367	12,134	(1,352)
Total gains or losses (realized /unrealized), included in other comprehensive income	5,088	(1,072)	4,304	1,116
Investment securities called	0	(375)	0	(900)
Discount accretion	41	57	80	123
Purchase of private equity securities	4,000	2,000	7,000	3,650
Sales And Repayments Of Private Equity Securities	(31,409)	(7,184)	(31,423)	(7,184)
Capitalized interest/dividends	13	62	67	123
Sale Of Risk Participation Agreement	(214)	(31)	(321)	(31)
Ending balance	176,112	189,939	176,112	189,939
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	(4,769)	367	(6,263)	(1,352)
State And Municipal Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	126,979	128,143	127,724	126,414
Total gains or losses (realized /unrealized), included in earnings	0	0	0	0
Total gains or losses (realized /unrealized), included in other comprehensive income	5,088	(1,072)	4,304	1,116
Investment securities called	0	(375)	0	(900)
Discount accretion	41	57	80	123
Purchase of private equity securities	0	0	0	0
Sales And Repayments Of Private Equity Securities	0	0	0	0
Capitalized interest/dividends	0	0	0	0
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	132,108	126,753	132,108	126,753
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	0	0	0	0
Private Equity Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	76,446	68,103	56,612	68,167
Total gains or losses (realized /unrealized), included in earnings	(4,858)	298	11,936	(1,477)
Total gains or losses (realized /unrealized), included in other comprehensive income	0	0	0	0
Investment securities called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	4,000	2,000	7,000	3,650
Sales And Repayments Of Private Equity Securities	(31,409)	(7,184)	(31,423)	(7,184)
Capitalized interest/dividends	13	62	67	123
Sale Of Risk Participation Agreement	0	0	0	0
Ending balance	44,192	63,279	44,192	63,279
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	(4,858)	298	(6,457)	(1,477)
Derivative Level Three Unobservable Inputs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	(67)	(131)	(65)	(187)
Total gains or losses (realized /unrealized), included in earnings	93	69	198	125
Total gains or losses (realized /unrealized), included in other comprehensive income	0	0	0	0
Investment securities called	0	0	0	0
Discount accretion	0	0	0	0
Purchase of private equity securities	0	0	0	0
Sales And Repayments Of Private Equity Securities	0	0	0	0
Capitalized interest/dividends	0	0	0	0
Sale Of Risk Participation Agreement	(214)	(31)	(321)	(31)
Ending balance	(188)	(93)	(188)	(93)
Total gains or losses included in earnings attributable to the change in unrealized gains or losses relating to assets still held at period end	$ 89	$ 69	$ 194	$ 125