Loans, Allowance for Loan Losses and Loans Held for Sale (Allowance Roll Forward) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at January 1	$ 49,804	$ 19,443
Provision for loan losses	23,101us-gaap_ProvisionForLoanAndLeaseLosses	16,579us-gaap_ProvisionForLoanAndLeaseLosses
Loans charged off	(17,864)	(8,696)
Recoveries of loans previously charged off	1,754	396
Allowance for loan losses at March 31	$ 56,795	$ 27,722

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

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- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

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Amount of expense related to estimated loss from loan and lease transactions.

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