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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

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

Summarizes Information Related to Restricted Stock

The following table summarizes information related to restricted stock held by the Company’s employees and directors for the periods presented:

	Shares			Weighted Average Grant Date Fair Value per Share
Non-vested shares outstanding December 31, 2011	391,278			$	25.40
Granted	753,285			29.66
Vested	(396,073	)		26.04
Forfeited	(48,066	)		31.15
Non-vested shares outstanding December 31, 2012	700,424			29.22
Granted	594,895			38.64
Vested	(160,219	)		27.66
Forfeited	(144,628	)		28.99
Non-vested shares outstanding December 31, 2013	990,472			$	28.20

Summarizes Information Related to Performance Share Units

The following table summarizes information related to PSUs held by the Company’s officers for the periods presented:

	Initial Unit Awards			Weighted Average Grant Date Fair Value per Unit
Non-vested PSUs at December 31, 2011	—			$	—
Granted	155,220			26.22
Vested	—			—
Forfeited	—			—
Non-vested PSUs at December 31, 2012	155,220			26.22
Granted	135,620			42.01
Vested	—			—
Forfeited	(21,540	)		32.89
Non-vested PSUs at December 31, 2013	269,300			$	33.64

Summary of Assumptions

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

	2013 PSUs			2012 PSUs
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)

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

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- Definition

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

+ References

No definition available.

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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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