Loans - Commercial Banking: Risk Profile by Geographic Region and Internal Risk Rating (Detail) (USD $) In Millions, unless otherwise specified				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended				0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2014 Commercial Banking	Dec. 31, 2013 Commercial Banking	Sep. 30, 2014 Commercial Banking	Dec. 31, 2013 Commercial Banking	Sep. 30, 2014 Commercial Banking Commercial and multifamily real estate	Dec. 31, 2013 Commercial Banking Commercial and multifamily real estate	Sep. 30, 2014 Commercial Banking Commercial and multifamily real estate	Dec. 31, 2013 Commercial Banking Commercial and multifamily real estate	Sep. 30, 2014 Commercial Banking Commercial and industrial	Dec. 31, 2013 Commercial Banking Commercial and industrial	Sep. 30, 2014 Commercial Banking Commercial and industrial	Dec. 31, 2013 Commercial Banking Commercial and industrial	Sep. 30, 2014 Commercial Banking Small-ticket commercial real estate	Dec. 31, 2013 Commercial Banking Small-ticket commercial real estate	Sep. 30, 2014 Commercial Banking Small-ticket commercial real estate	Dec. 31, 2013 Commercial Banking Small-ticket commercial real estate	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Northeast	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Northeast	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Mid-Atlantic	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable South	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable South	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Other	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable Other	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Dec. 31, 2013 Commercial Banking Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized nonperforming	Sep. 30, 2014 Commercial Banking Acquired Loans Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and multifamily real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Commercial and industrial Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Geographic Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Noncriticized	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Sep. 30, 2014 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing	Dec. 31, 2013 Commercial Banking Acquired Loans Small-ticket commercial real estate Internal Risk Rating Concentration Risk Loans Receivable Criticized Criticized performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-investment	$ 201,592	$ 197,199	$ 191,814			$ 49,788	$ 45,011			$ 22,895	$ 20,750			$ 26,071	$ 23,309			$ 822	$ 952			$ 49,578	$ 44,749			$ 22,152	$ 20,925			$ 4,179	$ 3,595			$ 15,171	$ 13,537			$ 8,076	$ 6,692			$ 49,578	$ 44,749			$ 48,219	$ 43,593			$ 1,198	$ 1,007			$ 161	$ 149			$ 22,832	$ 20,666			$ 15,188	$ 14,543			$ 2,356	$ 2,130			$ 3,266	$ 2,539			$ 2,022	$ 1,454			$ 22,832	$ 20,666			$ 22,442	$ 20,204			$ 330	$ 409			$ 60	$ 53			$ 25,924	$ 23,131			$ 6,458	$ 5,800			$ 1,793	$ 1,432			$ 11,855	$ 10,940			$ 5,818	$ 4,959			$ 25,924	$ 23,131			$ 24,963	$ 22,448			$ 864	$ 590			$ 97	$ 93			$ 822	$ 952			$ 506	$ 582			$ 30	$ 33			$ 50	$ 58			$ 236	$ 279			$ 822	$ 952			$ 814	$ 941			$ 4	$ 8			$ 4	$ 3			$ 210	$ 262			$ 210	$ 262			$ 189	$ 230			$ 21	$ 32			$ 63	$ 84			$ 63	$ 84			$ 60	$ 72			$ 3	$ 12			$ 147	$ 178			$ 147	$ 178			$ 129	$ 158			$ 18	$ 20			$ 0	$ 0			$ 0	$ 0			$ 0	$ 0			$ 0	$ 0
Percentage of portfolio				100.00%	100.00%			100.00%	100.00%			100.00%	100.00%			100.00%	100.00%			99.60%	99.40%			44.50%	46.40%			8.40%	8.00%			30.50%	30.10%			16.20%	14.90%			99.60%	99.40%			96.90%	96.90%			2.40%	2.20%			0.30%	0.30%			99.70%	99.60%			66.30%	70.10%			10.30%	10.30%			14.30%	12.20%			8.80%	7.00%			99.70%	99.60%			98.00%	97.40%			1.40%	2.00%			0.30%	0.20%			99.40%	99.20%			24.80%	24.90%			6.90%	6.10%			45.40%	46.90%			22.30%	21.30%			99.40%	99.20%			95.80%	96.30%			3.30%	2.50%			0.30%	0.40%			100.00%	100.00%			61.50%	61.30%			3.60%	3.40%			6.10%	6.00%			28.80%	29.30%			100.00%	100.00%			99.00%	98.90%			0.60%	0.80%			0.40%	0.30%			0.40%	0.60%			0.40%	0.60%			0.40%	0.50%			0.00%	0.10%			0.30%	0.40%			0.30%	0.40%			0.30%	0.30%			0.00%	0.10%			0.60%	0.80%			0.60%	0.80%			0.50%	0.70%			0.10%	0.10%			0.00%	0.00%			0.00%	0.00%			0.00%	0.00%			0.00%	0.00%
Acquired Loans	$ 24,685	$ 28,550				$ 210	$ 262			$ 63	$ 84			$ 147	$ 178			$ 0	$ 0