Property and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property and Equipment (Textual) [Abstract]
Depreciation expenses of continuing operations including amortization of asset under capital lease obligations	$ 116.6	$ 97.4	$ 109.2

Depreciation and amortization of assets under capital lease.

No definition available.

Name:	get_DepreciationAndAmortizationOfAssetsUnderCapitalLease
Namespace Prefix:	get_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant