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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Payments of Ordinary Dividends, Common Stock | $ 833 | $ 415
Unrecognized share based compensation, expected term (in Duration) | 1 year 10 months 24 days |
Directors compensation expense | $ 90 | $ 124
Common Stock, Dividends, Per Share, Declared | $ 0.050 | $ 0.025
Dividends, Common Stock, Cash | $ 800 | $ 400
Common Stock, Dividends, Per Share, Cash Paid |  | $ 0.025
Share-Based Compensation Aggrangement, By Share-Based Payment Award, Equity Instrument Other Than Options, Percent Represented By Relative Shareholder Return Performance | 50.00% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate |  | 0.53%
ESPP |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Expected dividend yield assumption (in Percent) | 0.77% |
Shares purchased through Employee Stock Purchase Plan (in Shares) | 13,639 |
Weighted average purchase price of ESPP shares purchased during the period (in Dollars per share) | $ 23.05 |
Share-based compensation expense | $ 96 | $ 77
Expected volatility assumption (in Percent) | 18.82% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |  | 3 months
Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based compensation expense | $ 200 | $ 300
Stock Granted, Value, Share-based Compensation, Net of Forfeitures |  | $ 600
Unrecognized share based compensation | $ 1,300 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 22,250
Restricted Stock | Maximum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 3 years
Stock Options |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Expected dividend yield assumption (in Percent) | 0.75% |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 20000.00% |
Share based compensation awards, options outstanding at period end (in Shares) | 1,977,406 |
Share based compensation awards, options outstanding and unvested at period end (in Shares) | 703,489 |
Share-based compensation expense | $ 500 | $ 600
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 5 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  | 10 years
Stock Granted, Value, Share-based Compensation, Net of Forfeitures |  | $ 3,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  | 445,450
Grants in period, weighted average exercise price (in dollars per share) |  | $ 26.54
Expected volatility assumption (in Percent) | 29.30% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 1.96% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 5 years |
Fair value assumptions, exercise price (in dollars per share) | $ 7.13 |
Performance Shares [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 101,040 |
Officers And Key Employees [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Directors compensation expense | $ 55 | $ 27
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value |  | $ 2,700
Share-based Compensation Award, Tranche One [Member] | New Director [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 50.00% |
Share-based Compensation Award, Tranche Two [Member] | New Director [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 50.00% |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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