Loans and Leases - Age Analysis of Past Due Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	$ 12,803	$ 28,566
Current	2,169,186	2,149,194
Acquired Credit Impaired	1,267	1,253
Loans and leases held for investment	2,183,256	2,179,013	$ 2,043,840
Recorded Investment 90 Days or more Past Due and Accruing Interest	693	379
Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	1,267	1,253
Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	6,465	17,632
Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	823	3,524
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	5,515	7,410
Commercial, Financial and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,258	5,441
Current	505,061	498,757
Loans and leases held for investment	507,319	504,515	491,279
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Commercial, Financial and Agricultural [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	0	317
Commercial, Financial and Agricultural [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	130	864
Commercial, Financial and Agricultural [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	298
Commercial, Financial and Agricultural [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,128	4,279
Real Estate-Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,137	13,205
Current	879,766	872,174
Loans and leases held for investment	881,420	885,892
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Commercial [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	517	513
Real Estate-Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	225	12,103
Real Estate-Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Real Estate-Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	912	1,102
Real Estate-Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Current	92,571	96,541
Loans and leases held for investment	92,571	96,541
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Construction [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	0	0
Real Estate-Construction [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Real Estate-Construction [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Real Estate-Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Real Estate-Residential Secured for Business Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	4,511	4,489
Current	213,003	213,871
Loans and leases held for investment	218,264	218,783	183,295
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Residential Secured for Business Purpose [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	750	423
Real Estate-Residential Secured for Business Purpose [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	3,562	1,406
Real Estate-Residential Secured for Business Purpose [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	62	2,356
Real Estate-Residential Secured for Business Purpose [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	887	727
Real Estate-Residential Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,194	1,368
Current	187,515	179,787
Loans and leases held for investment	188,709	181,155
Recorded Investment 90 Days or more Past Due and Accruing Interest	125	0
Real Estate-Residential Secured for Personal Purpose [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	0	0
Real Estate-Residential Secured for Personal Purpose [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	673	990
Real Estate-Residential Secured for Personal Purpose [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	52	69
Real Estate-Residential Secured for Personal Purpose [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	469	309
Real Estate-Home Equity Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	852	1,003
Current	139,886	135,952
Loans and leases held for investment	140,738	136,955
Recorded Investment 90 Days or more Past Due and Accruing Interest	353	0
Real Estate-Home Equity Secured for Personal Purpose [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	0	0
Real Estate-Home Equity Secured for Personal Purpose [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	210	777
Real Estate-Home Equity Secured for Personal Purpose [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	159	52
Real Estate-Home Equity Secured for Personal Purpose [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	483	174
Loans to Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	631	468
Current	27,790	29,264
Loans and leases held for investment	28,421	29,732	29,991
Recorded Investment 90 Days or more Past Due and Accruing Interest	205	173
Loans to Individuals [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	0	0
Loans to Individuals [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	289	198
Loans to Individuals [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	137	97
Loans to Individuals [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	205	173
Lease Financings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,220	2,592
Current	123,594	122,848
Loans and leases held for investment	125,814	125,440	$ 115,958
Recorded Investment 90 Days or more Past Due and Accruing Interest	10	206
Lease Financings [Member] | Valley Green Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Credit Impaired	0	0
Lease Financings [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,376	1,294
Lease Financings [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	413	652
Lease Financings [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	$ 431	$ 646