v2.4.0.6

Earnings Per Common Share - Basic and Diluted Earnings Per Share (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options to repurchase common stock	43,000

X

- Definition

Antidilutive Stock Options

+ References

No definition available.

+ Details

Name:	arex_AntidilutiveStockOptions
Namespace Prefix:	arex_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration