Shareholders' Equity	9 Months Ended
Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Dividend On October 17, 2018, the Corporation’s Board of Directors declared a regular quarterly dividend of $0.25 per share payable December 1, 2018 to shareholders of record as of November 1, 2018. During the third quarter of 2018, the Corporation paid or accrued, as applicable, a regular quarterly dividend of $0.25 per share. This dividend totaled $5.1 million, based on outstanding shares and restricted stock units as of August 1, 2018 of 20,443,918 shares. S-3 Shelf Registration Statement and Offerings Thereunder In May 2018, the Corporation filed a shelf registration statement on Form S-3, SEC File No. 333-224849 (the “Shelf Registration Statement”). The Shelf Registration Statement allows the Corporation to raise additional capital from time to time through offers and sales of registered securities consisting of common stock, debt securities, warrants, purchase contracts, rights and units or units consisting of any combination of the foregoing securities. The Corporation may sell these securities using the prospectus in the Shelf Registration Statement, together with applicable prospectus supplements, from time to time, in one or more offerings. In addition, the Corporation has in place a Dividend Reinvestment and Stock Purchase Plan (the “Plan”), which allows it to issue up to 1,500,000 shares of registered common stock. The Plan allows for the grant of a request for waiver (“RFW”) above the Plan’s maximum investment of $120 thousand per account per year. A RFW is granted based on a variety of factors, including the Corporation’s current and projected capital needs, prevailing market prices of the Corporation’s common stock and general economic and market conditions. For the three and nine months ended September 30, 2018, the Corporation did not issue any shares under the Plan. No RFWs were approved during the three and nine months ended September 30, 2018. No other sales of equity securities were executed under the Shelf Registration Statement during the three and nine months ended September 30, 2018. Option Exercises and Vesting of Restricted Stock Units ("RSUs") and Performance Stock Units ("PSUs") In addition to shares that may be issued through the Plan, the Corporation also issues shares through the exercise of stock options and the vesting of RSUs and PSUs. During the three and nine months ended September 30, 2018, 15,150 shares and 63,825 shares, respectively, were issued pursuant to the exercise of stock options, increasing shareholders’ equity by $349 thousand and $1.5 million, respectively. The increase in shareholders’ equity related to the vesting of RSUs and PSUs, which is recognized over the vesting period through stock based compensation expense, was $708 thousand and $1.9 million for the three and nine months ended September 30, 2018, respectively. Stock Repurchases On August 6, 2015, the Corporation announced a stock repurchase program (the “2015 Program”) under which the Corporation may repurchase up to 1,200,000 shares of the Corporation’s common stock, at an aggregate purchase price not to exceed $40 million. During the three months ended September 30, 2018, 14,263 shares were repurchased under the 2015 Program. As of September 30, 2018, the maximum number of shares remaining authorized for repurchase under the 2015 Program was 175,037. In addition to the 2015 Program, it is the Corporation’s practice to retire shares to its treasury account upon the vesting of stock awards to certain officers in order to cover the statutory income tax withholdings related to such vestings.

Shareholders’ Equity

Dividend

On October 17, 2018, the Corporation’s Board of Directors declared a regular quarterly dividend of $0.25 per share payable December 1, 2018 to shareholders of record as of November 1, 2018. During the third quarter of 2018, the Corporation paid or accrued, as applicable, a regular quarterly dividend of $0.25 per share. This dividend totaled $5.1 million, based on outstanding shares and restricted stock units as of August 1, 2018 of 20,443,918 shares.

S-3 Shelf Registration Statement and Offerings Thereunder

In May 2018, the Corporation filed a shelf registration statement on Form S-3, SEC File No. 333-224849 (the “Shelf Registration Statement”). The Shelf Registration Statement allows the Corporation to raise additional capital from time to time through offers and sales of registered securities consisting of common stock, debt securities, warrants, purchase contracts, rights and units or units consisting of any combination of the foregoing securities. The Corporation may sell these securities using the prospectus in the Shelf Registration Statement, together with applicable prospectus supplements, from time to time, in one or more offerings.

In addition, the Corporation has in place a Dividend Reinvestment and Stock Purchase Plan (the “Plan”), which allows it to issue up to 1,500,000 shares of registered common stock. The Plan allows for the grant of a request for waiver (“RFW”) above the Plan’s maximum investment of $120 thousand per account per year. A RFW is granted based on a variety of factors, including the Corporation’s current and projected capital needs, prevailing market prices of the Corporation’s common stock and general economic and market conditions.

For the three and nine months ended September 30, 2018, the Corporation did not issue any shares under the Plan. No RFWs were approved during the three and nine months ended September 30, 2018. No other sales of equity securities were executed under the Shelf Registration Statement during the three and nine months ended September 30, 2018.

Option Exercises and Vesting of Restricted Stock Units ("RSUs") and Performance Stock Units ("PSUs")

In addition to shares that may be issued through the Plan, the Corporation also issues shares through the exercise of stock options and the vesting of RSUs and PSUs. During the three and nine months ended September 30, 2018, 15,150 shares and 63,825 shares, respectively, were issued pursuant to the exercise of stock options, increasing shareholders’ equity by $349 thousand and $1.5 million, respectively. The increase in shareholders’ equity related to the vesting of RSUs and PSUs, which is recognized over the vesting period through stock based compensation expense, was $708 thousand and $1.9 million for the three and nine months ended September 30, 2018, respectively.

Stock Repurchases

On August 6, 2015, the Corporation announced a stock repurchase program (the “2015 Program”) under which the Corporation may repurchase up to 1,200,000 shares of the Corporation’s common stock, at an aggregate purchase price not to exceed $40 million. During the three months ended September 30, 2018, 14,263 shares were repurchased under the 2015 Program. As of September 30, 2018, the maximum number of shares remaining authorized for repurchase under the 2015 Program was 175,037. In addition to the 2015 Program, it is the Corporation’s practice to retire shares to its treasury account upon the vesting of stock awards to certain officers in order to cover the statutory income tax withholdings related to such vestings.