Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014	Dec. 31, 2013
Accumulated other comprehensive income	$ 91,717		$ 40,499		$ 62,093	$ 9,731
Other Comprehensive Income Before Reclassifications	49,636		43,723
Reclassified from Accumulated Oher Comprehensive Income	(1,854)		5,903
Other Comprehensive Income (Loss), before Tax	47,782		49,626
Other Comprehensive Income (Loss), Tax	(18,158)		(18,858)
Other Comprehensive Income (Loss), Net of Tax	29,624		30,768
Unrealized Gain Loss on Securities OTTI [Member]
Accumulated other comprehensive income	3,663	[1]	4,369	[1]	3,791	4,203
Other Comprehensive Income Before Reclassifications	(223)		(78)
Reclassified from Accumulated Oher Comprehensive Income	17		346
Other Comprehensive Income (Loss), before Tax	(206)		268	[1]
Other Comprehensive Income (Loss), Tax	78		(102)
Other Comprehensive Income (Loss), Net of Tax	(128)	[1]	166	[1]
Unrealized Gain Loss on Securities Other [Member]
Accumulated other comprehensive income	110,656	[1]	51,682	[1]	81,310	21,303
Other Comprehensive Income Before Reclassifications	49,859		43,801
Reclassified from Accumulated Oher Comprehensive Income	(2,526)		5,197
Other Comprehensive Income (Loss), before Tax	47,333	[1]	48,998	[1]
Other Comprehensive Income (Loss), Tax	(17,987)		(18,619)
Other Comprehensive Income (Loss), Net of Tax	29,346	[1]	30,379	[1]
Pension Loss [Member]
Accumulated other comprehensive income	(22,602)	[2]	(15,552)	[2]	(23,008)	(15,775)
Other Comprehensive Income Before Reclassifications	0		0
Reclassified from Accumulated Oher Comprehensive Income	655		360
Other Comprehensive Income (Loss), before Tax	655	[2]	360	[2]
Other Comprehensive Income (Loss), Tax	(249)		(137)
Other Comprehensive Income (Loss), Net of Tax	$ 406	[2]	$ 223	[2]

[1] The pre-tax amounts reclassified from accumulated other comprehensive income are included in "investment securities gains (losses), net" in the consolidated statements of income.

[2] The pre-tax amounts reclassified from accumulated other comprehensive income are included in the computation of net periodic pension cost as "amortization of unrecognized net loss" (see Note 6), for inclusion in the consolidated statements of income.