ALLL Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Allowance for loan and lease losses
Balance at beginning of period	$ 130,351	$ 130,854
Provision for loan losses	1,122	2,100
Charge-offs	(1,586)	(3,614)
Recoveries	842	1,495
Balance at end of period	130,729	130,835
Residential Real Estate
Allowance for loan and lease losses
Balance at beginning of period	14,067	15,482
Provision for loan losses	(178)	23
Charge-offs	(36)	(177)
Recoveries	213	83
Balance at end of period	14,066	15,411
Commercial Real Estate
Allowance for loan and lease losses
Balance at beginning of period	70,332	74,398
Provision for loan losses	40	(952)
Charge-offs	(181)	(765)
Recoveries	380	654
Balance at end of period	70,571	73,335
Other Commercial
Allowance for loan and lease losses
Balance at beginning of period	28,630	21,567
Provision for loan losses	933	1,699
Charge-offs	(1,163)	(1,158)
Recoveries	84	373
Balance at end of period	28,484	22,481
Home Equity
Allowance for loan and lease losses
Balance at beginning of period	9,299	10,659
Provision for loan losses	203	1,457
Charge-offs	(113)	(1,338)
Recoveries	37	55
Balance at end of period	9,426	10,833
Other Consumer
Allowance for loan and lease losses
Balance at beginning of period	8,023	8,748
Provision for loan losses	124	(127)
Charge-offs	(93)	(176)
Recoveries	128	330
Balance at end of period	$ 8,182	$ 8,775