Loans, Past Due And Accruing Restructured (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	$ 5,374		$ 2,961
Past-due 90 days or more and still accruing	825		250
Total non-accrual and past-due 90 days or more and still accruing	6,199		3,211
Accruing restructured loans	14,239		15,151
Total	20,438		18,362
Percentage of total non-accrual loans and loans past-due 90 days or more and still accruing to total loans	0.90%		0.56%
Percentage of total non-accrual loans, loans past-due 90 days or more and still accruing, and accruing restructured loans to total loans	2.98%		3.20%
Loans sold to Federal Home Loan Mortgage Corporation Loans serviced for other investors unpaid balance	133,504		90,343
Total loans sold to Federal Home Loan Mortgage Corporation	610	7,175
Commercial and Industrial [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	318		144
Commercial Secured By Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	3,683		1,418
Residential Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	1,373		1,399
Financial Receivable Other [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	3,346		2,448
Past-due 90 days or more and still accruing	825		250
Total non-accrual and past-due 90 days or more and still accruing	4,171		2,698
Accruing restructured loans	13,559		14,481
Total	17,730		17,179
Financial Receivable Other [Member] | Commercial and Industrial [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	0		144
Percentage of total non-accrual loans and loans past-due 90 days or more and still accruing to total loans
Financial Receivable Other [Member] | Commercial Secured By Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	2,200		1,048
Percentage of total non-accrual loans, loans past-due 90 days or more and still accruing, and accruing restructured loans to total loans
Financial Receivable Other [Member] | Residential Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	1,146		1,256
Financial Receivable Acquired Credit Imparied [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	2,028		513
Past-due 90 days or more and still accruing	0		0
Total non-accrual and past-due 90 days or more and still accruing	2,028		513
Accruing restructured loans	680		670
Total	2,708		1,183
Financial Receivable Acquired Credit Imparied [Member] | Commercial and Industrial [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	318		0
Financial Receivable Acquired Credit Imparied [Member] | Commercial Secured By Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	1,483		370
Financial Receivable Acquired Credit Imparied [Member] | Residential Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Non-accrual loans	$ 227		$ 143