Loans and Leases (Accretable Yield Movement Schedule) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 86,771	$ 114,335	$ 95,579	$ 132,829
Accretion to interest income	(9,219)	(9,977)	(18,131)	(24,175)
Disposals	(4,262)	(2,748)	(7,549)	(11,261)
Reclassifications from nonaccretable difference	9,016	9,769	12,407	13,986
Balance, end of period	$ 82,306	$ 111,379	$ 82,306	$ 111,379