Long-Term Debt and Other Borrowed Funds (Details) - USD ($)	1 Months Ended	9 Months Ended
	Feb. 29, 2008	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Feb. 28, 2008	Jan. 10, 2008
Debt Instrument
Long-term debt and capital lease obligations			$ 27,885,000	$ 38,067,000
Fiscal Year Maturities of Long-term Debt
2015			65,000
2016			71,000
2017			20,077,000
2018			83,000
2019			90,000
Thereafter			7,499,000
Long-term debt and capital lease obligations			27,885,000	38,067,000
Debt Instrument, Issuance Date		Jan. 29, 2015
Unamortized Debt Issuance Expense			7,000
Other borrowings			2,000	9,000
Debt Instrument, Maturity Date		Jul. 29, 2022
Parent Company
Debt Instrument
Long-term debt			20,000,000	20,000,000
Subordinated Debt | Subordinated Term Loan, 6.81% | Parent Company
Debt Instrument
Long-term debt			$ 20,000,000	20,000,000
Fiscal Year Maturities of Long-term Debt
Debt instrument, face amount						$ 20,000,000
Debt instrument, interest rate, stated percentage			6.81%			6.81%
Subordinated Debt | Subordinated Term Loan, Variable Rate | Subsidiaries
Debt Instrument
Long-term debt			$ 0	15,000,000
Fiscal Year Maturities of Long-term Debt
Debt instrument, face amount					$ 15,000,000
Debt instrument, interest rate at period end			2.24%
Subordinated Debt | Subordinated Term Loan, Variable Rate | Subsidiaries | LIBOR
Fiscal Year Maturities of Long-term Debt
Debt instrument, basis spread on variable rate	2.00%
Subordinated Debt | Note Payable, 6.24% | Parent Company
Fiscal Year Maturities of Long-term Debt
Debt instrument, interest rate, stated percentage						6.24%
Notes Payable to Banks | Notes Payable to FHLB | Subsidiaries
Debt Instrument
Long-term debt			$ 0	225,000
Fiscal Year Maturities of Long-term Debt
FHLB, advances, weighted average interest rate			4.86%
Capital Lease Obligations | Capital Lease Obligation, 8.00% | Subsidiaries
Debt Instrument
Capital Lease Obligations			$ 1,582,000	1,643,000
Fiscal Year Maturities of Long-term Debt
Debt instrument, interest rate, stated percentage			8.00%
Federal Home Loan Bank | Notes Payable to FHLB | Subsidiaries
Fiscal Year Maturities of Long-term Debt
FHLB, advances, maximum amount available			$ 752,639,000
Long-term FHLB advances				225,000
Federal Funds Purchased
Fiscal Year Maturities of Long-term Debt
Line of credit facility, maximum borrowing capacity			165,000,000
Federal Reserve Bank Advances
Fiscal Year Maturities of Long-term Debt
Line of credit facility, maximum borrowing capacity			407,739,000
Notes Payable, Other Payables [Member] | Note Payable, 6.24% | Subsidiaries
Debt Instrument
Long-term debt			1,343,000	1,199,000
Fiscal Year Maturities of Long-term Debt
Debt instrument, face amount			1,343,000
Notes Payable, Other Payables [Member] | Note Payable, 2.24% | Subsidiaries
Debt Instrument
Long-term debt			$ 4,960,000	$ 0
Secured Debt [Member]
Fiscal Year Maturities of Long-term Debt
Debt instrument, face amount		$ 4,960,000
Debt instrument, interest rate, stated percentage		2.28%
Noncontrolling Interest, Ownership Percentage by Parent		99.90%