Segment Information (Segment Financial Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net Interest Income	$ 18,196	$ 16,225
Net Gains on Sales of Loans	476	754
Net Gains on Securities	228	613
Trust and Investment Product Fees	922	817
Insurance Revenues	2,556	1,784
Noncash Items:
Provision for Loan Losses	350	350
Depreciation and Amortization	1,216	1,099
Income Tax Expense (Benefit)	2,732	2,514
Segment Profit (Loss)	6,305	5,809
Segment Assets	2,146,390		2,163,827
Core Banking [Member]
Segment Reporting Information [Line Items]
Net Interest Income	18,313	16,764
Net Gains on Sales of Loans	476	754
Net Gains on Securities	228	613
Trust and Investment Product Fees	2	3
Insurance Revenues	(3)	9
Noncash Items:
Provision for Loan Losses	350	350
Depreciation and Amortization	1,143	950
Income Tax Expense (Benefit)	2,490	2,744
Segment Profit (Loss)	5,698	5,848
Segment Assets	2,156,332		2,171,837
Trust and Investment Advisory Services [Member]
Segment Reporting Information [Line Items]
Net Interest Income	4	5
Net Gains on Sales of Loans	0	0
Net Gains on Securities	0	0
Trust and Investment Product Fees	920	815
Insurance Revenues	5	13
Noncash Items:
Provision for Loan Losses	0	0
Depreciation and Amortization	6	7
Income Tax Expense (Benefit)	(42)	(2)
Segment Profit (Loss)	(69)	(8)
Segment Assets	11,573		11,663
Insurance [Member]
Segment Reporting Information [Line Items]
Net Interest Income	1	7
Net Gains on Sales of Loans	0	0
Net Gains on Securities	0	0
Trust and Investment Product Fees	0	0
Insurance Revenues	2,554	1,762
Noncash Items:
Provision for Loan Losses	0	0
Depreciation and Amortization	29	105
Income Tax Expense (Benefit)	501	147
Segment Profit (Loss)	718	211
Segment Assets	6,067		5,636
Other [Member]
Segment Reporting Information [Line Items]
Net Interest Income	(122)	(551)
Net Gains on Sales of Loans	0	0
Net Gains on Securities	0	0
Trust and Investment Product Fees	0	(1)
Insurance Revenues	0	0
Noncash Items:
Provision for Loan Losses	0	0
Depreciation and Amortization	38	37
Income Tax Expense (Benefit)	(217)	(375)
Segment Profit (Loss)	(42)	(242)
Segment Assets	$ (27,582)		$ (25,309)