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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Section 50
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- Definition

Restricted period to employees on the stock granted during the period.

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- Definition

Number of shares outstanding for which restrictions had not lapsed.

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Description of restriction lapse grant to employees.

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No definition available.

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Equity Based Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Equity Based Plans (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 17, 2016	Mar. 16, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	2,700,000
Number of common shares available for grant (in shares)	566,118
Shares outstanding for which restrictions had not lapsed (in shares)	232,997
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 4,962	$ 4,491	$ 3,363
Compensation not yet recognized	$ 6,700
Amended 2003 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	2,100,000			2,100,000	1,750,000
Number of common shares available for grant (in shares)	558,343
Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period on the stock granted	4 years
Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period on the stock granted	4 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restrictions will lapse in	2020
Maximum [Member] \| Non Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	600,000
Maximum [Member] \| Amended 2003 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares available for grant (in shares)	2,100,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restrictions will lapse in	2017