Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Allowance for loan losses	$ 5,957,000	$ 8,037,000
Net operating loss	133,524,000	137,412,000
Compensation and benefit plans	544,000	1,277,000
Fair value basis on securities	363,000	656,000
Pension and other post-retirement benefits	1,857,000	1,470,000
Other real estate owned	2,176,000	2,256,000
Gross unrealized securities losses	3,787,000	2,560,000
Other	474,000	851,000
Subtotal deferred tax assets	148,682,000	154,519,000
Less: Valuation allowance	0	(1,300,000)
Total deferred tax assets	148,682,000	153,219,000
Deferred tax liabilities:
Core deposit intangible	953,000	1,513,000
Depreciable basis of premises and equipment	301,000	563,000
Net deferred loan fees and costs	1,726,000	1,306,000
Gross unrealized securities gains	352,000	490,000
Fair value basis of loans	3,186,000	2,473,000
Other	448,000	441,000
Total deferred tax liabilities	6,966,000	6,786,000
Net deferred tax assets	$ 141,716,000	$ 146,433,000