TWO Annual report pursuant to Section 13 and 15(d)

Accrued Interest Receivable Schedule of Accounts, Notes, Loans and Financing Receivable (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 42,613	$ 23,437
Loans Held-for-sale, Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	247	38
US Treasury Securities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	1,119	1,003
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	11,888	5,844
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	17,101	9,770
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	8,962	4,454
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	3,296	2,328
Available-for-sale Securities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 41,247	$ 22,396