Loans Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for (recovery of) loan losses	$ 14,097	$ 339	$ (4,410)
Loan Type
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	17,881	17,065
Charge-offs	(16,698)	(2,715)
Recoveries	1,562	3,192
Net (charge-offs) recoveries	(15,136)	477
Provision for (recovery of) loan losses	13,794	339
Ending balance	17,881	17,065		$ 16,539	$ 17,881
Period-end amount allocated to:
Loans individually evaluated for impairment				1,820	1,014
Loans collectively evaluated for impairment				14,719	16,867
Ending balance	17,881	17,065		16,539	17,881
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	4,036	2,174
Charge-offs	(13,576)	(199)
Recoveries	98	77
Net (charge-offs) recoveries	(13,478)	(122)
Provision for (recovery of) loan losses	14,824	1,984
Ending balance	4,036	2,174		5,382	4,036
Period-end amount allocated to:
Loans individually evaluated for impairment				351	816
Loans collectively evaluated for impairment				5,031	3,220
Ending balance	4,036	2,174		5,382	4,036
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	1,627	881
Charge-offs	(628)	(478)
Recoveries	315	169
Net (charge-offs) recoveries	(313)	(309)
Provision for (recovery of) loan losses	(57)	1,055
Ending balance	1,627	881		1,257	1,627
Period-end amount allocated to:
Loans individually evaluated for impairment				106	9
Loans collectively evaluated for impairment				1,151	1,618
Ending balance	1,627	881		1,257	1,627
Home equity lines of credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	694	343
Charge-offs	(125)	(128)
Recoveries	119	36
Net (charge-offs) recoveries	(6)	(92)
Provision for (recovery of) loan losses	44	443
Ending balance	694	343		732	694
Period-end amount allocated to:
Loans individually evaluated for impairment				0	0
Loans collectively evaluated for impairment				732	694
Ending balance	694	343		732	694
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	1,587	316
Charge-offs	(1,353)	(1,191)
Recoveries	755	697
Net (charge-offs) recoveries	(598)	(494)
Provision for (recovery of) loan losses	982	1,765
Ending balance	1,587	316		1,971	1,587
Period-end amount allocated to:
Loans individually evaluated for impairment				0	0
Loans collectively evaluated for impairment				1,971	1,587
Ending balance	1,587	316		1,971	1,587
Deposit account overdrafts
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	112	136
Charge-offs	(774)	(516)
Recoveries	171	153
Net (charge-offs) recoveries	(603)	(363)
Provision for (recovery of) loan losses	612	339
Ending balance	112	136		121	112
Period-end amount allocated to:
Loans individually evaluated for impairment				0	0
Loans collectively evaluated for impairment				121	112
Ending balance	112	136		121	112
Commercial real estate, other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	9,825	13,215
Charge-offs	(242)	(203)
Recoveries	104	2,060
Net (charge-offs) recoveries	(138)	1,857
Provision for (recovery of) loan losses	(2,611)	(5,247)
Ending balance	9,825	13,215		7,076	9,825
Period-end amount allocated to:
Loans individually evaluated for impairment				1,363	189
Loans collectively evaluated for impairment				5,713	9,636
Ending balance	9,825	13,215		7,076	9,825
Acquired Purchased Credit Impaired Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, January 1, 2013	0	0	0
Charge-offs	(63)	0	0
Recoveries	0	0	0
Net (charge-offs) recoveries	(63)	0	0
Ending balance	0	0	0	240	0
Period-end amount allocated to:
Ending balance	0	0	0	$ 240	$ 0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	$ 303	$ 0	$ 0