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SHARE-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2015

SHARE-BASED COMPENSATION

Schedule of assumptions used to estimate the fair value of stock options granted

		2013
Risk free rate			2.47	%
Volatility ratio			89.60	%
Dividend yield			—
Annual exit rate			3.58	%
Exercise multiple			4.10

Summary of the option activity

Number of Options

Weighted Average Exercise Price

Weighted Average Remaining Contract Terms

Aggregate Intrinsic Value

$

In Thousands of U.S. Dollars

Options outstanding at January 1, 2015

846,113

12.21

5 years

11,794

Granted

—

—

Exercised

(167,587

)

11.14

Forfeited

(2,817

)

9.33

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Options outstanding at December 31, 2015

675,709

12.44

3 years

12,354

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​

​

​

​

​

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​

​

Options vested or expected to be vested at December 31, 2015

673,105

12.45

3 years

12,302

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Options exercisable at December 31, 2015

664,459

12.50

3 years

12,129

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Summary of the RSU activity

		Number of Shares			Weighted Average Grant-Date Fair Value
					$
Unvested at January 1, 2015			1,610,219			7.76
Granted			574,488			27.34
Vested			(636,000	)		7.27
Forfeited			(237,297	)		14.39
​	​	​	​	​	​	​	​
Unvested at December 31, 2015			1,311,410			15.75
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

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- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ 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)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ 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)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ 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)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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