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Note 10 - Stock-based Compensation | 3 Months Ended
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Mar. 31, 2017
Notes to Financial Statements |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Note 10 . Stock- Based Compensation The Company maintains the 2016 Stock Plan (“2016 Plan”), the 2006 Stock Plan (“2006 Plan”) and the 2011 Employee Stock Purchase Plan (“2011 ESPP”). In connection with the acquisition of Fidelity, the Company assumed the Fidelity 2004 Long Term Incentive Plan and the 2005 Long Term Incentive Plan (the “Fidelity Plans”). In connection with the acquisition of Virginia Heritage, the Company assumed the Virginia Heritage 2006 Stock Option Plan and the 2010 Long Term Incentive Plan (the “Virginia Heritage Plans”). No additional options may be granted under the 2006 Plan, the Fidelity Plans, or the Virginia Heritage Plans. The Company adopted the 2016 Plan upon approval by the shareholders at the 2016 Annual Meeting held on May 12, 2016. The 2016 Plan provides directors and selected employees of the Bank, the Company and their affiliates with the opportunity to acquire shares of stock, through awards of options, time vested restricted stock, performance-based restricted stock and stock appreciation rights. Under the 2016 Plan, 1,000,000 shares of common stock were initially reserved for issuance. For awards that are service based, compensation expense is being recognized over the service (vesting) period based on fair value, which for stock option grants is computed using the Black-Scholes model. For restricted stock awards granted under the 2006 plan, fair value is based on the average of the high and low stock price of the Company’s shares on the date of grant. For restricted stock awards granted under the 2016 plan, fair value is based on the Company’s closing price on the date of grant. For awards that are performance-based, compensation expense is recorded based on the probability of achievement of the goals underlying the grant. In February 2017, the Company awarded 91,097 shares of time vested restricted stock to senior officers, directors, and certain employees. The shares vest in three substantially equal installments beginning on the first anniversary of the date of grant. In February 2017, the Company awarded senior officers a targeted number of 36,523 performance vested restricted stock units (PRSUs). The vesting of PRSUs is 100% after three years with payouts based on threshold, target or maximum average performance targets over the three year period relative to a peer index. The three performance metrics are average annual earnings per share growth, average annual total shareholder return and average annual return on average assets, in each case as compared to companies in the KBW Regional Banking Index. Below is a summary of stock option activity for the three months ended March 31, 2017 and 2016. The information excludes restricted stock units and awards.
|  | Three Months Ended March 31, |
|  | 2017 |  |  | 2016 |
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Shares |  |  | Weighted- Average Exercise Price |
Beginning balance |  |  | 216,859 |  |  | $ | 8.80 |  |  |  | 298,740 |  |  | $ | 9.97 |
Issued |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | (2,675 | ) |  |  | 24.67 |  |  |  | (16,759 | ) |  |  | 11.80 |
Forfeited |  |  | - |  |  |  | - |  |  |  | (1,100 | ) |  |  | 15.48 |
Expired |  |  | - |  |  |  | - |  |  |  | (6,037 | ) |  |  | 13.57 |
Ending balance |  |  | 214,184 |  |  | $ | 8.60 |  |  |  | 274,844 |  |  | $ | 9.76 |
The following summarizes information about stock options outstanding at March 31, 2017. The information excludes restricted stock units and awards.
Outstanding: |  | Stock Options |  |  | Weighted-Average |  |  | Weighted-Average Remaining |
Range of Exercise Prices |  | Outstanding |  |  | Exercise Price |  |  | Contractual Life |
$5.76 | $10.72 |  |  | 154,535 |  |  | $ | 5.76 |  |  |  | 1.56 |
$10.73 | $15.45 |  |  | 47,886 |  |  |  | 10.83 |  |  |  | 1.18 |
$15.46 | $20.01 |  |  | 447 |  |  |  | 16.66 |  |  |  | 5.97 |
$20.02 | $49.91 |  |  | 11,316 |  |  |  | 37.59 |  |  |  | 7.77 |
|  |  |  | 214,184 |  |  | $ | 8.60 |  |  |  | 1.81 |
Exercisable: |  | Stock Options |  |  | Weighted-Average |  |  |  |  |
Range of Exercise Prices |  | Exercisable |  |  | Exercise Price |  |  |  |  |
$5.76 | $10.72 |  |  | 119,837 |  |  | $ | 5.76 |  |  |  |  |
$10.73 | $15.45 |  |  | 47,886 |  |  |  | 10.83 |  |  |  |  |
$15.46 | $20.01 |  |  | 447 |  |  |  | 16.66 |  |  |  |  |
$20.02 | $49.91 |  |  | 2,906 |  |  |  | 22.20 |  |  |  |  |
|  |  |  | 171,076 |  |  | $ | 7.49 |  |  |  |  |
The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option pricing model with the assumptions as shown in the table below used for grants during the years ended December 31, 2016 and 2015. There were no grants of stock options during the three months ended March 31, 2017.
|  | Three Months Ended |  |  | Years Ended December 31, |
|  | March 31, 2017 |  |  | 2016 |  |  | 2015 |
Expected volatility |  |  | n/a |  |  |  | 24.23 | % |  |  | 31.21 | %
Weighted-Average volatility |  |  | n/a |  |  |  | 24.23 | % |  |  | 31.21 | %
Expected dividends |  |  | - |  |  |  | - |  |  |  | - |
Expected term (in years) |  |  | n/a |  |  |  | 7.0 |  |  |  | 7.0 |
Risk-free rate |  |  | n/a |  |  |  | 1.37 | % |  |  | 1.64 | %
Weighted-average fair value (grant date) |  |  | n/a |  |  | $ | 14.27 |  |  | $ | 16.73 |
The total intrinsic value of outstanding stock options was $11.0 million at March 31, 2017. The total intrinsic value of stock options exercised during the three months ended March 31, 2017 and 2016 was $103 thousand and $604 thousand, respectively. The total fair value of stock options vested was $34 thousand and $40 thousand for the three months ended March 31, 2017 and 2016, respectively. Unrecognized stock-based compensation expense related to stock options totaled $115 thousand at March 31, 2017. At such date, the weighted-average period over which this unrecognized expense was expected to be recognized was 2.52 years. The Company has unvested restricted stock awards and PRSU grants of 247,351 shares at March 31, 2017. Unrecognized stock based compensation expense related to restricted stock awards totaled $10.8 million at March 31, 2017. At such date, the weighted-average period over which this unrecognized expense was expected to be recognized was 2.31 years. The following table summarizes the unvested restricted stock awards at March 31, 2017 and 2016.
|  | Three Months Ended March 31, |
|  | 2017 |  |  | 2016 |
|  | Shares |  |  | Weighted- Average Grant Date Fair Value |  |  | Shares |  |  | Weighted- Average Grant Date Fair Value |
Unvested at beginning |  |  | 296,192 |  |  | $ | 34.61 |  |  |  | 369,093 |  |  | $ | 24.43 |
Issued |  |  | 127,620 |  |  |  | 61.21 |  |  |  | 139,732 |  |  |  | 46.17 |
Forfeited |  |  | (327 | ) |  |  | 43.07 |  |  |  | (766 | ) |  |  | 37.48 |
Vested |  |  | (176,134 | ) |  |  | 28.73 |  |  |  | (195,188 | ) |  |  | 22.53 |
Unvested at end |  |  | 247,351 |  |  | $ | 52.51 |  |  |  | 312,871 |  |  | $ | 35.29 |
Approved by shareholders in May 2011, the 2011 ESPP reserved 550,000 shares of common stock (as adjusted for stock dividends) for issuance to employees. Whole shares are sold to participants in the plan at 85% of the lower of the stock price at the beginning or end of each quarterly offering period. The 2011 ESPP is available to all eligible employees who have completed at least one year of continuous employment, work at least 20 hours per week and at least five months a year. Participants may contribute a minimum of $10 per pay period to a maximum of $6,250 per offering period or $25,000 annually (not to exceed more than 10% of compensation per pay period). At March 31, 2017, the 2011 ESPP had 413,238 shares remaining for issuance. Included in salaries and employee benefits in the accompanying Consolidated Statements of Operations, the Company recognized $1.9 million and $1.4 million in stock-based compensation expense for the three months ended March 31, 2017 and 2016, respectively. Stock-based compensation expense is recognized ratably over the requisite service period for all awards.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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