Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

+ References

No definition available.

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Unrecognized cost of unvested options awarded to employees as compensation.

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No definition available.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Name Accounting Standards Codification
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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
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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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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No definition available.

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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).

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-Publisher FASB
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-Paragraph 2
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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 2
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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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-Publisher FASB
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-Paragraph 2
-Subparagraph (c)
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Employee Stock Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized for issuance as equity-based compensation		2,960,000
Stock Options Granted		108,297	233,054	203,825
Award vesting period		4 years
Share-based compensation expense		$ 5,917	$ 5,283	$ 5,063
Unrecognized compensation expense related to nonvested stock options		1,500
Total fair value of shares (options) vested during period		$ 1,700	$ 1,100	$ 1,700
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options Granted		108,297	233,054	203,825
Weighted average period for unrecognized compensation costs to be recognized		2 years
Award expiration period		10 years
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted		0	2,600	244,229
Weighted average period for unrecognized compensation costs to be recognized		2 years 11 months 23 days
Award expiration period		10 years
Unrecognized compensation expense related to nonvested non-option awards		$ 700
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted		219,010	123,782	131,555
Weighted average period for unrecognized compensation costs to be recognized		2 years 1 month 10 days
Total fair value of shares (non-options) vested during period		$ 4,200	$ 2,200	$ 4,000
Unrecognized compensation expense related to nonvested non-option awards		$ 5,000
Cash Settled Restricted Stock Units (CRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	115,687	1,025	115,687
Weighted average period for unrecognized compensation costs to be recognized		2 years 11 months 23 days
Unrecognized compensation expense related to nonvested non-option awards		$ 1,500
Chief Executive Officer [Member] \| Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted				240,829