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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Performance Share Units

The following table summarizes PSUs held by the Company’s officers at March 31, 2013:

		PSUs				Weighted Average Grant Date Fair Value per Unit
Non-vested PSUs at December 31, 2012			155,220			$	26.22
Granted			135,620			$	42.01
Vested			—
Forfeited			—
Non-vested PSUs at March 31, 2013			290,840			$	33.58

Summary of Assumptions

The following assumptions were used for the Monte Carlo models to determine the grant date fair value and associated stock-based compensation expense of the PSUs granted:

		2013 Grants				2012 Grants
Forecast period (years)			4.00				4.01
Risk-free rate			0.65	%			0.46	%
Oasis volatility			47.48	%			51.00	%

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- Definition

Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ 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)(2)

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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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