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Long-Term Incentive Compensation and Stock Based Compensation - Additional Information (Detail) (2009 Equity Incentive Plan [Member], USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation Awards	266
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for restricted stock	1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for restricted stock	4 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares awarded in next quarter subject to future performance requirement	122
Stock based compensation awards issued shares	134
Market value of shares on the date of grant	$ 931	$ 2,082
Vesting period for restricted stock	4 years
Reversal of Provision for performance based award	54
Provision for performance based award		0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation awards issued shares	144
Market value of shares on the date of grant	$ 1,096	$ 694
Vesting period of time-based long term incentive award		4 years

X

- Definition

The total fair value of shares issued during the period under a deferred compensation arrangement.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65

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Number of share instruments newly issued under a share-based compensation plan.

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- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

+ References

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Number of shares awarded in the quarter subject to future performance requirements.

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