Fair Value Measurements Not Measured at Fair Value on a Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Fair Value	$ 110,917	$ 0
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	191,881	308,744
Held-to-maturity Securities, Fair Value	112,014
Loans Receivable, Fair Value Disclosure	5,036,088	4,730,079
Loans Held-for-sale, Fair Value Disclosure	6,123	308,390
Other Assets, Fair Value Disclosure	117,840	118,087
Deposits, Fair Value Disclosure	5,110,370	4,885,059
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	102,353	116,319
Subordinated Debt Obligations, Fair Value Disclosure	106,363	143,647
Deposits Held For Sale, Fair Value Disclosure		194,084
Federal Home Loan Bank Borrowings, Fair Value Disclosure	367,254	408,121
Other Liabilities, Fair Value Disclosure	9,789	10,058
Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	191,881	308,744
Held-to-maturity Securities, Fair Value	110,917
Loans Receivable, Fair Value Disclosure	4,985,555	4,766,574
Loans Held-for-sale, Fair Value Disclosure	6,130	308,908
Other Assets, Fair Value Disclosure	117,840	118,087
Deposits, Fair Value Disclosure	5,113,224	4,891,465
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	102,343	117,885
Subordinated Debt Obligations, Fair Value Disclosure	96,363	117,502
Deposits Held For Sale, Fair Value Disclosure		182,592
Federal Home Loan Bank Borrowings, Fair Value Disclosure	377,384	428,037
Other Liabilities, Fair Value Disclosure	9,789	10,058
Fair Value, Inputs, Level 1 [Member] | Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	191,881	308,744
Held-to-maturity Securities, Fair Value	0
Loans Receivable, Fair Value Disclosure	0	0
Loans Held-for-sale, Fair Value Disclosure	0	0
Other Assets, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	0	0
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Subordinated Debt Obligations, Fair Value Disclosure	0	0
Deposits Held For Sale, Fair Value Disclosure		0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Held-to-maturity Securities, Fair Value	110,917
Loans Receivable, Fair Value Disclosure	0	0
Loans Held-for-sale, Fair Value Disclosure	6,130	308,908
Other Assets, Fair Value Disclosure	117,840	118,087
Deposits, Fair Value Disclosure	5,113,224	4,891,465
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	102,343	117,885
Subordinated Debt Obligations, Fair Value Disclosure	0	12,804
Deposits Held For Sale, Fair Value Disclosure		182,592
Federal Home Loan Bank Borrowings, Fair Value Disclosure	377,384	428,037
Other Liabilities, Fair Value Disclosure	9,789	10,058
Fair Value, Inputs, Level 3 [Member] | Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Held-to-maturity Securities, Fair Value	0
Loans Receivable, Fair Value Disclosure	4,985,555	4,766,574
Loans Held-for-sale, Fair Value Disclosure	0	0
Other Assets, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	0	0
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Subordinated Debt Obligations, Fair Value Disclosure	96,363	104,698
Deposits Held For Sale, Fair Value Disclosure		0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	$ 0	$ 0