Consolidated Statements of Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012 2012 Offering [Member]	Dec. 31, 2012 2012 Offering [Member]	Mar. 31, 2013 2013 Offering [Member]	Dec. 31, 2013 2013 Offering [Member]
Offering costs	$ 13,904	$ 40,928	$ 40,928	$ 44,003	$ 85,984

Fees paid to an agent employed by a corporation or mutual fund to maintain shareholder records, including purchases, sales, and account balances. Also includes custodian fees incurred during an accounting period from an agent, bank, trust company, or other organization that holds and safeguards an individual's, mutual fund's, or investment company's assets for them. These fees will be billed back to the client and are a component of noninterest expense.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.14)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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