Available-For-Sale And Held-To-Maturity Securities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 security		Dec. 31, 2012		Dec. 31, 2011
AvailableForSaleMortgageBackedSecuritiesTransferredToHeldToMaturity	$ 1,100,000,000
Gains or losses recorded in consolidated statement of operations			3,800,000
Carrying value of securities pledged as collateral	505,500,000		613,800,000
Available-for-sale Securities	1,756,253,000		1,625,168,000
Available-for-sale Securities, Amortized cost	1,762,516,000		1,601,102,000
Credit-related other-than-temporary impairment			600,000		1,900,000
Gross unrealized losses related to all other securities	20,285,000	[1]	3,394,000	[1]
Unrealized gains on available-for-sale securities, net of tax	(48,528,000)	[2]	8,684,000	[2]	2,103,000	[2]
Realized gains resulted from sale of available-for-sale securities	2,000,000				7,900,000
Proceeds from sale of available-for-sale securities	197,500,000		250,200,000		362,100,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	100
Available-for-sale securities related to individual securities, number of positions	100
Available-For-Sale Securities [Member]
Available-for-sale Securities	800,700,000,000
Available-for-sale securities, percentage of investment portfolio	45.60%
Available-for-sale Securities, Amortized cost	821,000,000,000
Gross unrealized losses related to all other securities	$ 20,300,000

[1] Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive income.

[2] Net of taxes of $32.4 million, $5.8 million, and $1.4 million for the years ended December 31, 2013, 2012, and 2011, respectively.Amounts are net of reclassifications to earnings of realized gains of $1.2 million, $2.4 million, and $4.9 million for the years ended December 31, 2013, 2012, and 2011, respectively.