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Loans (Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade) (Details) | Sep. 30, 2015 USD ($) number | Jun. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) number | Jun. 30, 2014 USD ($) | Dec. 31, 2013 USD ($)
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Allowance for loan losses |  | $ 210,814,000 | $ 221,351,000 | $ 232,448,000 | $ 238,641,000 | $ 243,628,000 | $ 253,809,000
Total loans collectively evaluated for impairment |  | 16,372,366,000 |  |  | 15,409,050,000 |  |
Total loans individually evaluated for impairment |  | 325,470,000 |  |  | 362,844,000 |  |
Allowance - collectively evaluated for impairment |  | 151,370,000 |  |  | 169,583,000 |  |
Allowance - individually evaluated for impairment |  | 56,525,000 |  |  | 66,219,000 |  |
Allowance - purchased credit impaired loans |  | 2,919,000 |  |  | 2,839,000 |  |
Purchase credit impaired loans - recorded investment |  | 27,656,000 |  |  | 40,123,000 |  |
General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Total loans collectively evaluated for impairment |  | 7,884,924,000 |  |  | 7,141,868,000 |  |
Total loans individually evaluated for impairment |  | 26,904,000 |  |  | 33,987,000 |  |
Total commercial loans |  | 7,916,838,000 |  |  | 7,180,931,000 |  |
Purchase credit impaired loans - recorded investment |  | 5,010,000 |  |  | 5,076,000 |  |
Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Total loans collectively evaluated for impairment |  | 1,375,320,000 |  |  | 957,641,000 |  |
Total loans individually evaluated for impairment |  | 0 |  |  | 0 |  |
Total commercial loans |  | 1,375,320,000 |  |  | 957,641,000 |  |
Purchase credit impaired loans - recorded investment |  | 0 |  |  | 0 |  |
TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Total loans collectively evaluated for impairment | [1] | 305,382,000 |  |  | 325,882,000 |  |
Total loans individually evaluated for impairment | [1] | 12,755,000 |  |  | 12,875,000 |  |
Total commercial loans | [1] | 318,137,000 |  |  | 338,757,000 |  |
LOCOM valuation allowance |  | $ 26,200,000 |  |  | $ 26,200,000 |  |
Highest internal grade | number |  | 13 |  |  | 13 |  |
Purchase credit impaired loans - recorded investment |  | $ 0 |  |  | $ 0 |  |
Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Total loans collectively evaluated for impairment |  | 1,437,000,000 |  |  | 1,185,603,000 |  |
Total loans individually evaluated for impairment |  | 8,892,000 |  |  | 15,554,000 |  |
Total commercial loans |  | 1,464,425,000 |  |  | 1,233,745,000 |  |
Purchase credit impaired loans - recorded investment |  | 18,533,000 |  |  | 32,588,000 |  |
Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Total loans collectively evaluated for impairment |  | 20,568,000 |  |  | 36,033,000 |  |
Total loans individually evaluated for impairment |  | 1,417,000 |  |  | 6,811,000 |  |
Total commercial loans |  | 23,619,000 |  |  | 44,649,000 |  |
Purchase credit impaired loans - recorded investment |  | $ 1,634,000 |  |  | $ 1,805,000 |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Percent of total commercial loans |  | 100.00% |  |  | 100.00% |  |
Allowance for loan losses |  | $ 96,811,000 |  |  | $ 85,320,000 |  |
Total loans collectively evaluated for impairment |  | 11,023,194,000 |  |  | 9,647,027,000 |  |
Total loans individually evaluated for impairment |  | 49,968,000 |  |  | 69,227,000 |  |
Total commercial loans |  | 11,098,339,000 |  |  | 9,755,723,000 |  |
Allowance - collectively evaluated for impairment |  | 87,654,000 |  |  | 75,396,000 |  |
Allowance - individually evaluated for impairment |  | 6,743,000 |  |  | 7,143,000 |  |
Allowance - purchased credit impaired loans |  | $ 2,414,000 |  |  | $ 2,781,000 |  |
Percent of loan collectively evaluated for impairment |  | 99.00% |  |  | 99.00% |  |
Percent of loan individually evaluated for impairment |  | 1.00% |  |  | 1.00% |  |
Purchase credit impaired loans - recorded investment |  | $ 25,177,000 |  |  | $ 39,469,000 |  |
Percent of loan purchased-credit impaired |  | 0.00% |  |  | 0.00% |  |
Commercial Loan P D Grade One [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 530,543,000 |  |  | $ 441,874,000 |  |
Percent of total commercial loans |  | 5.00% |  |  | 5.00% |  |
Allowance for loan losses |  | $ 127,000 |  |  | $ 0 |  |
Commercial Loan P D Grade One [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 529,836,000 |  |  | 441,590,000 |  |
Commercial Loan P D Grade One [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 0 |  |
Commercial Loan P D Grade One [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade One [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 707,000 |  |  | 221,000 |  |
Commercial Loan P D Grade One [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 63,000 |  |
Commercial Loan P D Grade Two [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 601,575,000 |  |  | $ 358,903,000 |  |
Percent of total commercial loans |  | 5.00% |  |  | 4.00% |  |
Allowance for loan losses |  | $ 322,000 |  |  | $ 338,000 |  |
Commercial Loan P D Grade Two [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 590,614,000 |  |  | 355,805,000 |  |
Commercial Loan P D Grade Two [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 0 |  |
Commercial Loan P D Grade Two [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Two [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 10,835,000 |  |  | 2,854,000 |  |
Commercial Loan P D Grade Two [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 126,000 |  |  | 244,000 |  |
Commercial Loan P D Grade Three [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 872,195,000 |  |  | $ 487,791,000 |  |
Percent of total commercial loans |  | 8.00% |  |  | 5.00% |  |
Allowance for loan losses |  | $ 311,000 |  |  | $ 264,000 |  |
Commercial Loan P D Grade Three [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 453,831,000 |  |  | 412,110,000 |  |
Commercial Loan P D Grade Three [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 327,776,000 |  |  | 46,838,000 |  |
Commercial Loan P D Grade Three [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Three [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 90,588,000 |  |  | 28,750,000 |  |
Commercial Loan P D Grade Three [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 93,000 |  |
Commercial Loan P D Grade Four [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 1,248,043,000 |  |  | $ 624,055,000 |  |
Percent of total commercial loans |  | 11.00% |  |  | 6.00% |  |
Allowance for loan losses |  | $ 949,000 |  |  | $ 671,000 |  |
Commercial Loan P D Grade Four [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 822,515,000 |  |  | 446,092,000 |  |
Commercial Loan P D Grade Four [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 315,061,000 |  |  | 148,852,000 |  |
Commercial Loan P D Grade Four [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Four [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 110,165,000 |  |  | 28,815,000 |  |
Commercial Loan P D Grade Four [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 302,000 |  |  | 296,000 |  |
Commercial Loan P D Grade Five [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 1,671,220,000 |  |  | $ 1,368,359,000 |  |
Percent of total commercial loans |  | 15.00% |  |  | 14.00% |  |
Allowance for loan losses |  | $ 6,901,000 |  |  | $ 2,741,000 |  |
Commercial Loan P D Grade Five [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 1,190,085,000 |  |  | 947,041,000 |  |
Commercial Loan P D Grade Five [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 239,391,000 |  |  | 177,435,000 |  |
Commercial Loan P D Grade Five [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Five [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 234,729,000 |  |  | 239,166,000 |  |
Commercial Loan P D Grade Five [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 7,015,000 |  |  | 4,717,000 |  |
Commercial Loan P D Grade Six [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 1,902,487,000 |  |  | $ 1,557,150,000 |  |
Percent of total commercial loans |  | 17.00% |  |  | 16.00% |  |
Allowance for loan losses |  | $ 10,630,000 |  |  | $ 1,790,000 |  |
Commercial Loan P D Grade Six [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 1,201,553,000 |  |  | 1,090,900,000 |  |
Commercial Loan P D Grade Six [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 350,401,000 |  |  | 275,710,000 |  |
Commercial Loan P D Grade Six [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Six [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 347,740,000 |  |  | 184,961,000 |  |
Commercial Loan P D Grade Six [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 2,793,000 |  |  | 5,579,000 |  |
Commercial Loan P D Grade Seven [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 1,735,832,000 |  |  | $ 1,640,673,000 |  |
Percent of total commercial loans |  | 16.00% |  |  | 17.00% |  |
Allowance for loan losses |  | $ 13,891,000 |  |  | $ 2,777,000 |  |
Commercial Loan P D Grade Seven [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 1,278,443,000 |  |  | 1,178,283,000 |  |
Commercial Loan P D Grade Seven [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 98,262,000 |  |  | 193,667,000 |  |
Commercial Loan P D Grade Seven [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Seven [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 354,457,000 |  |  | 262,318,000 |  |
Commercial Loan P D Grade Seven [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 4,670,000 |  |  | 6,405,000 |  |
Commercial Loan P D Grade Eight [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 916,885,000 |  |  | $ 1,022,759,000 |  |
Percent of total commercial loans |  | 8.00% |  |  | 10.00% |  |
Allowance for loan losses |  | $ 13,953,000 |  |  | $ 2,339,000 |  |
Commercial Loan P D Grade Eight [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 747,760,000 |  |  | 747,305,000 |  |
Commercial Loan P D Grade Eight [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 18,189,000 |  |  | 88,114,000 |  |
Commercial Loan P D Grade Eight [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Eight [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 150,375,000 |  |  | 183,145,000 |  |
Commercial Loan P D Grade Eight [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 561,000 |  |  | 4,195,000 |  |
Commercial Loan P D Grade Nine [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 449,445,000 |  |  | $ 668,978,000 |  |
Percent of total commercial loans |  | 4.00% |  |  | 7.00% |  |
Allowance for loan losses |  | $ 8,310,000 |  |  | $ 4,559,000 |  |
Commercial Loan P D Grade Nine [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 377,998,000 |  |  | 540,472,000 |  |
Commercial Loan P D Grade Nine [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 26,240,000 |  |  | 18,251,000 |  |
Commercial Loan P D Grade Nine [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Nine [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 42,995,000 |  |  | 107,636,000 |  |
Commercial Loan P D Grade Nine [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 2,212,000 |  |  | 2,619,000 |  |
Commercial Loan P D Grade Ten [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 219,315,000 |  |  | $ 341,280,000 |  |
Percent of total commercial loans |  | 2.00% |  |  | 3.00% |  |
Allowance for loan losses |  | $ 4,635,000 |  |  | $ 4,001,000 |  |
Commercial Loan P D Grade Ten [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 188,711,000 |  |  | 291,984,000 |  |
Commercial Loan P D Grade Ten [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 8,774,000 |  |
Commercial Loan P D Grade Ten [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Ten [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 30,515,000 |  |  | 39,306,000 |  |
Commercial Loan P D Grade Ten [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 89,000 |  |  | 1,216,000 |  |
Commercial Loan P D Grade Eleven [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 215,725,000 |  |  | $ 350,966,000 |  |
Percent of total commercial loans |  | 2.00% |  |  | 4.00% |  |
Allowance for loan losses |  | $ 5,861,000 |  |  | $ 7,538,000 |  |
Commercial Loan P D Grade Eleven [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 186,974,000 |  |  | 314,927,000 |  |
Commercial Loan P D Grade Eleven [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 0 |  |
Commercial Loan P D Grade Eleven [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Eleven [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 28,004,000 |  |  | 33,214,000 |  |
Commercial Loan P D Grade Eleven [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 747,000 |  |  | 2,825,000 |  |
Commercial Loan P D Grade Twelve [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 90,447,000 |  |  | $ 136,728,000 |  |
Percent of total commercial loans |  | 1.00% |  |  | 1.00% |  |
Allowance for loan losses |  | $ 2,975,000 |  |  | $ 1,383,000 |  |
Commercial Loan P D Grade Twelve [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 80,836,000 |  |  | 106,550,000 |  |
Commercial Loan P D Grade Twelve [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 0 |  |
Commercial Loan P D Grade Twelve [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Twelve [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 9,095,000 |  |  | 29,250,000 |  |
Commercial Loan P D Grade Twelve [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 516,000 |  |  | 928,000 |  |
Commercial Loan P D Grade Thirteen [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 421,665,000 |  |  | $ 451,103,000 |  |
Percent of total commercial loans |  | 4.00% |  |  | 5.00% |  |
Allowance for loan losses |  | $ 4,256,000 |  |  | $ 6,716,000 |  |
Commercial Loan P D Grade Thirteen [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 112,423,000 |  |  | 115,198,000 |  |
Commercial Loan P D Grade Thirteen [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 0 |  |
Commercial Loan P D Grade Thirteen [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 305,382,000 |  |  | 325,882,000 |  |
Commercial Loan P D Grade Thirteen [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 3,600,000 |  |  | 8,085,000 |  |
Commercial Loan P D Grade Thirteen [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 260,000 |  |  | 1,938,000 |  |
Commercial Loan P D Grade Fourteen Fifteen Sixteen [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 147,817,000 |  |  | $ 196,408,000 |  |
Percent of total commercial loans |  | 1.00% |  |  | 2.00% |  |
Allowance for loan losses |  | $ 14,533,000 |  |  | $ 40,279,000 |  |
Commercial Loan P D Grade Fourteen Fifteen Sixteen [Member] | General C I [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 123,345,000 |  |  | 153,611,000 |  |
Commercial Loan P D Grade Fourteen Fifteen Sixteen [Member] | Loans To Mortgage Companies [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 0 |  |  | 0 |  |
Commercial Loan P D Grade Fourteen Fifteen Sixteen [Member] | TRUPs [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade | [1] | 0 |  |  | 0 |  |
Commercial Loan P D Grade Fourteen Fifteen Sixteen [Member] | Income C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | 23,195,000 |  |  | 37,882,000 |  |
Commercial Loan P D Grade Fourteen Fifteen Sixteen [Member] | Residential C R E [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Commercial loan, Disaggregated by PD grade |  | $ 1,277,000 |  |  | $ 4,915,000 |  |
[1] | Balances as of September 30 , 2015 and 2014 , each presented net of $ 26.2 million in lower of cost or market (“LOCOM”) valuation allowance. Based on the underlying structure of the notes, the highest possible internal grade is " 13 ".

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