Loans Receivable (Accretable yield and non-accretable discount activity of covered loans) (Details) (Acquired Loans In An F D I C Assisted Transaction [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Acquired Loans In An F D I C Assisted Transaction [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 162,959	$ 188,008
Accretion Accretable	(23,388)	(20,229)
Transfer from (to) non-accretable discount	8,196	6,328
Balance at end of period	147,767	174,107
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	129,477	237,555
Principal Losses	(13,958)	(16,991)
Transfer (to) from accretable yield	(8,196)	(6,328)
Balance at end of period	$ 107,323	$ 214,236

Loans Receivable (Accretable yield and non-accretable discount activity of covered loans) (Details) (Acquired Loans In An F D I C Assisted Transaction [Member], USD $)
In Thousands, unless otherwise specified

3 Months Ended

Mar. 31, 2014

Mar. 31, 2013

Acquired Loans In An F D I C Assisted Transaction [Member]

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]

Balance at beginning of period

$ 162,959

$ 188,008

Accretion Accretable

(23,388)

(20,229)

Transfer from (to) non-accretable discount