Loans and Credit Quality - Past Due Loans And Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	$ 4,836	$ 5,955
Greater than 90 days still accruing	0	0
Nonaccrual loans	3,686	4,674
Total current, subtotal	980,563	923,100
Total financing receivables	985,399	929,055
Less: unearned origination fee, net of origination costs	(4,612)	(4,551)
Total loans	980,787	924,504
Asset Quality Rating - Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	601	1,241
Greater than 90 days still accruing	0	0
Nonaccrual loans	0	0
Total current, subtotal	951,300	900,670
Total financing receivables	951,901	901,911
Asset Quality Rating - Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	312	0
Greater than 90 days still accruing	0	0
Nonaccrual loans	0	0
Total current, subtotal	496	20,012
Total financing receivables	808	20,012
Asset Quality Rating - Substandard
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,923	4,714
Greater than 90 days still accruing	0	0
Nonaccrual loans	3,686	4,674
Total current, subtotal	28,767	2,418
Total financing receivables	32,690	7,132
30-59 Days Past Due Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,129	736
30-59 Days Past Due Still Accruing | Asset Quality Rating - Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	601	696
30-59 Days Past Due Still Accruing | Asset Quality Rating - Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	312	0
30-59 Days Past Due Still Accruing | Asset Quality Rating - Substandard
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	216	40
60-89 Days Past Due Still Accruing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	21	545
60-89 Days Past Due Still Accruing | Asset Quality Rating - Pass
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	545
60-89 Days Past Due Still Accruing | Asset Quality Rating - Special Mention
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	0
60-89 Days Past Due Still Accruing | Asset Quality Rating - Substandard
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	$ 21	$ 0