Loans (Schedule of Acquired Impaired Loans, Accretable Yield and Carrying Amount) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Covered impaired loan
Accretable Yield
Balance at beginning of period	$ 29,867	$ 37,511	$ 63,003	$ 37,511	$ 67,282
Accretion	(4,100)		(12,139)	(9,667)	(24,755)
Net reclassifications from nonaccretable to accretable	2,136		5,549	2,080	11,606
Disposals	(1,753)		(2,758)	(3,774)	(478)
Balance at end of period	26,150	29,867	53,655	26,150	53,655
Movement In Mortgage Loans On Real Estate Roll Forward
Balance at beginning of period	199,225	232,452	364,488	232,452	403,692
Accretion	4,100		12,139	9,667	24,755
Payments received, net	(45,517)		(60,146)	(84,311)	(111,966)
Balance at end of period	157,808	199,225	316,481	157,808	316,481
Acquired Impaired Loans
Accretable Yield
Balance at beginning of period	118,756	119,450	142,284	119,450	136,646
Accretion	(10,285)		12,746	21,503	24,487
Net reclassifications from nonaccretable to accretable	8,217	21,212	10,499		30,013
Disposals	(4,657)		2,595	7,128	4,730
Balance at end of period	112,031	118,756	137,442	112,031	137,442
Movement In Mortgage Loans On Real Estate Roll Forward
Balance at beginning of period	388,313	423,209	557,199	423,209	601,000
Accretion	10,285		12,746	21,503	24,487
Payments received, net	(42,434)		50,695	88,548	106,237
Balance at end of period	$ 356,164	$ 388,313	$ 519,250	$ 356,164	$ 519,250