Fair Value Measurements (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Fair Value Measurement (Textual) [Abstract]
Transfers in and out of Level 1 and 2 categories	$ 0	$ 0

Amount of transfers of assets measured on a recurring basis in level 2 and level 1.

No definition available.

Name:	asi_FairValueAssetsLevelOneAndLevelTwoTransfersInAndOutAmount
Namespace Prefix:	asi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration