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Share-based compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Estimated Grant Date Fair Value of Share Options, Using Black-Scholes Option-Pricing Formula

We estimate the fair value of each stock option on the date of grant using a Black-Scholes option-pricing formula, applying the following assumptions, and amortize the fair value to expense over the option’s vesting period using the straight-line attribution approach for employees and non-employee directors:

		Three Months Ended June 30, 2015
Expected term (in years)			4
Risk-free interest rate			1.57	%
Expected volatility			20.97	%
Expected dividend yield			0.00	%

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- References

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (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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