Fair Value Qualitative information about Level 3 fair value measurements (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 4,940,407	$ 4,779,758
Impaired loans carried at fair value	12,599	16,963
Other Assets, Fair Value Disclosure	4,916,210	4,757,461
Loans Held-for-sale, Fair Value Disclosure	11,403	5,264
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	12,599	16,963
Other Assets, Fair Value Disclosure	8,915	10,312
Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	12,599	16,963
Other Assets, Fair Value Disclosure	8,915	10,312
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	4,354	6,473
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	4,354	6,473
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	5,785	8,481
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 5,785	8,481
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans carried at fair value		$ 8,481
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	8.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	8.00%	8.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	23.00%	23.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	68.00%	84.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	8.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	13.30%	9.50%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	50.00%	23.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	25.80%	38.80%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	8.00%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.20%	9.40%
Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	42.10%	23.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans carried at fair value		$ 2,078
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	5.00%	5.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	10.70%	10.80%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	40.00%	35.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	10.70%	10.80%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	22.10%	17.50%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	10.70%	10.80%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans carried at fair value		$ 3,483
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.20%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	10.00%	10.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	67.00%	76.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	20.00%	22.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.00%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	13.10%	45.40%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	13.70%	16.50%
Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.00%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 1,757	$ 2,369
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 1,757	2,369
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans carried at fair value		$ 2,921
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	3.80%	7.90%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Minimum [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	33.30%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	61.80%	120.60%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	10.10%	10.00%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Maximum [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	50.00%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	13.60%	11.10%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	9.10%	8.00%
Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member] \| Weighted Average [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation	42.50%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	5.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Minimum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	9.50%	8.40%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Minimum [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation		60.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	71.00%	87.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Maximum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	9.50%	10.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Maximum [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation		95.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 2,804	$ 1,470
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	27.10%	30.50%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	9.50%	9.40%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Commercial [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Cost Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Accumulated Depreciation		77.50%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Minimum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate		15.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Minimum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	15.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	54.70%	82.90%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Maximum [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate		15.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Maximum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	15.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 4,354	$ 6,473
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	21.20%	27.10%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Bulk Sale Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate		15.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Construction [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate	15.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Minimum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%	0.00%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Minimum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate		6.80%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Maximum [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	45.60%	38.30%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Maximum [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate		7.80%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other Assets, Fair Value Disclosure	$ 1,757	$ 2,369
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Sales Comparison Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	11.80%	10.10%
Fair Value, Measurements, Nonrecurring [Member] \| Other Real Estate Owned, Residential [Member] \| Real Estate [Member] \| Weighted Average [Member] \| Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Cap Rate		7.60%
Construction Real Estate, SEPH Commercial Land and Development [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 2,045	$ 2,078
Construction Real Estate, SEPH Commercial Land and Development [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	2,045	2,078
Construction Real Estate - Remaining Commercial [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	2,696	3,483
Construction Real Estate - Remaining Commercial [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	2,696	3,483
Fair Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans carried at fair value		$ 16,963
Fair Value [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	5,785
Fair Value [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Residential Real Estate [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	2,073
Fair Value [Member] \| Construction Real Estate, SEPH Commercial Land and Development [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	2,045
Fair Value [Member] \| Construction Real Estate - Remaining Commercial [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Construction Real Estate [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable, Fair Value Disclosure	$ 2,696

Fair Value Qualitative information about Level 3 fair value measurements (Details) - USD ($)
$ in Thousands

9 Months Ended

12 Months Ended

Sep. 30, 2015

Dec. 31, 2014

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Loans Receivable, Fair Value Disclosure

$ 4,940,407

$ 4,779,758

Impaired loans carried at fair value

12,599

16,963