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Shareholders' equity (Tables)

3 Months Ended

Mar. 31, 2014

Shareholders' equity

Summary of Stock Option Activity under Plan

		For the Three Months Ended March 31,
		2014						2013
		Stock Options			Weighted Average Exercise Price			Stock Options			Weighted Average Exercise Price
Outstanding at beginning of the period			1,190,000		$	15.48			—		$	—
Granted			970,000			16.63			700,000			15.00
Exercised			—			—			—			—
Forfeited			(41,250	)		16.18			—			—
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Outstanding at end of the period			2,118,750		$	15.99			700,000		$	15.00
​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​	​	​	​
Exercisable at end of the period			160,000		$	15.00			—		$	—

Summary of Black-Scholes Option Pricing Model Inputs used for Valuation of Stock Options Outstanding

Weighted average fair value		$	5.01
Weighted average remaining life (years)			9.9
Expected term (years)			7.0
Dividend Yield			3	%
Volatility			38.5	%
Risk-free interest rate			2.2	%

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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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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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