Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

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

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-Paragraph 1

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

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-Name Accounting Standards Codification

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Premises and Equipment (Details) (USD $)	12 Months Ended
Premises and Equipment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 221,525,000us-gaap_PropertyPlantAndEquipmentGross	$ 205,625,000us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation and amortization	(49,435,000)	(50,893,000)
Total	172,090,000us-gaap_PropertyPlantAndEquipmentNet	154,732,000us-gaap_PropertyPlantAndEquipmentNet
Depreciation and amortization expense	10,900,000us-gaap_DepreciationAndAmortization	10,200,000us-gaap_DepreciationAndAmortization	6,300,000us-gaap_DepreciationAndAmortization
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	52,338,000	48,992,000
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	103,240,000	94,878,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	21,199,000	14,254,000
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	28,486,000	29,465,000
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	596,000	546,000
Computer Software, Intangible Asset [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 15,666,000	$ 17,490,000