Business Combinations Changes in the Carrying Amount of Accretable Yield for Purchased Loans at Acquisition Date (Details) (USD $) In Thousands, unless otherwise specified	Apr. 12, 2013
Changes in Carrying Amount of Accretable Yield for Purchased Loans Acquisition Date [Line Items]
Accretable yield	$ (355,825)

The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

No definition available.

Name:	us-gaap_CertainLoansAcquiredInTransferAccretableYield
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant