Leases (Details 3) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended
Dec. 31, 2013	Jan. 31, 2013	Jan. 31, 2012
Summarizes rent expense
Rent expense	$ 8,316	$ 9,211	$ 8,279

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration