Divestitures and Acquisitions (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale	$ 6,123,000	$ 308,390,000
Deposits Held for Sale	0	194,084,000
Other assets	118,045,000	124,956,000
Other liabilities	97,613,000	95,386,000
Gain on sale of Pacific Northwest offices	10,574,000	0	0
Discontinued Operation, Tax Effect of Discontinued Operation	6,121,000	2,532,000	4,447,000
Pacific Northwest Assets and Liabilities Held for Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		276,700,000
Other assets		3,200,000
Other liabilities		100,000
DTC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		800,000
Discontinued Operation, Tax Effect of Discontinued Operation		$ 600,000
Westfield Capital Management Company LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Nature of Activities Having Continuing Cash Flows after Disposal	12.5% share in Westfield’s revenues (up to an annual maximum of $11.6 million)
Discontinued Operation, Period of Continuing Cash Flows after Disposal	through December 2017