Fair Value Measurements - Recurring and Nonrecurring (Details) (USD $) | 3 Months Ended | 12 Months Ended | |
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | $427,811,000 | | $432,535,000 | |
Valuation allowance | 8,399,000 | 8,321,000 | 8,308,000 | 9,208,000 |
Provision for credit losses | 0 | 0 | | |
Carrying Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 427,811,000 | | 432,535,000 | |
Loans receivable | 568,594,000 | | 564,280,000 | |
Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 7,655,000 | | 7,585,000 | |
Loans receivable | 0 | | 0 | |
Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 420,156,000 | | 424,950,000 | |
Loans receivable | 0 | | 0 | |
Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Loans receivable | 566,525,000 | | 564,667,000 | |
Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 427,811,000 | | 432,535,000 | |
Loans receivable | 566,525,000 | | 564,667,000 | |
Valuation allowance | -245,000 | | 3,921,000 | |
Loans, charge-offs | 400,000 | 923,000 | 3,539,000 | |
Nonrecurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Other real estate owned | 0 | | | |
Assets, fair value | 0 | | 0 | |
Nonrecurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Other real estate owned | 0 | | | |
Assets, fair value | 0 | | 0 | |
Nonrecurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Other real estate owned | 348,000 | | | |
Assets, fair value | 812,000 | | 7,796,000 | |
Nonrecurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Other real estate owned | 348,000 | | | |
Assets, fair value | 812,000 | | 7,796,000 | |
Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Assets, fair value | 7,655,000 | | 7,585,000 | |
Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Assets, fair value | 420,156,000 | | 424,950,000 | |
Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Assets, fair value | 0 | | 0 | |
Recurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Assets, fair value | 427,811,000 | | 432,535,000 | |
U.S. Government agencies | Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
U.S. Government agencies | Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 50,648,000 | | 33,090,000 | |
U.S. Government agencies | Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
U.S. Government agencies | Recurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 50,648,000 | | 33,090,000 | |
Obligations of states and political subdivisions | Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Obligations of states and political subdivisions | Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 152,451,000 | | 149,295,000 | |
Obligations of states and political subdivisions | Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Obligations of states and political subdivisions | Recurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 152,451,000 | | 149,295,000 | |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 212,581,000 | | 237,872,000 | |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 212,581,000 | | 237,872,000 | |
Private label residential mortgage backed securities | Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Private label residential mortgage backed securities | Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 4,476,000 | | 4,693,000 | |
Private label residential mortgage backed securities | Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Private label residential mortgage backed securities | Recurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 4,476,000 | | 4,693,000 | |
Other equity securities | Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 7,655,000 | | 7,585,000 | |
Other equity securities | Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Other equity securities | Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 0 | | 0 | |
Other equity securities | Recurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Available-for-sale investment securities | 7,655,000 | | 7,585,000 | |
Impaired loans | Nonrecurring | Carrying Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 555,000 | | 8,239,000 | |
Valuation allowance | 91,000 | | 443,000 | |
Impaired loans | Nonrecurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Impaired loans | Nonrecurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Impaired loans | Nonrecurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 464,000 | | 7,796,000 | |
Impaired loans | Nonrecurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 464,000 | | 7,796,000 | |
Commercial | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Valuation allowance | 3,129,000 | 2,012,000 | 3,130,000 | 2,444,000 |
Commercial | Impaired loans | Nonrecurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Commercial | Impaired loans | Nonrecurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Commercial | Impaired loans | Nonrecurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 320,000 | | 7,019,000 | |
Commercial | Impaired loans | Nonrecurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 320,000 | | 7,019,000 | |
Real Estate Portfolio Segment | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Valuation allowance | 4,457,000 | 4,672,000 | 4,058,000 | 5,174,000 |
Consumer | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Valuation allowance | 765,000 | 1,391,000 | 1,078,000 | 1,168,000 |
Consumer | Impaired loans | Nonrecurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | | | 0 | |
Consumer | Impaired loans | Nonrecurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | | | 0 | |
Consumer | Impaired loans | Nonrecurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | | | 777,000 | |
Consumer | Impaired loans | Nonrecurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | | | 777,000 | |
Commercial and industrial | Impaired loans | Nonrecurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 320,000 | | | |
Commercial and industrial | Impaired loans | Nonrecurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Commercial and industrial | Impaired loans | Nonrecurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Commercial and industrial | Impaired loans | Nonrecurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 320,000 | | 7,019,000 | |
Commercial and industrial | Impaired loans | Nonrecurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | | | 7,019,000 | |
Equity loans and lines of credit | Impaired loans | Nonrecurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 144,000 | | | |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 0 | | 0 | |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | 144,000 | | 777,000 | |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Fair Value | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Loans receivable | | | $777,000 | |