Fair Value Measurements, Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	$ 4,464,161	$ 9,136,813
Debt Securities, Held-to-maturity, gross	2,739,241	210,999
Debt Securities, Held-to-maturity, Allowance for Credit Loss	(558)	(555)
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	2,738,683	210,444
Available for sale securities	11,493,860	13,157,817
Fair value option securities	296,590	43,770
Residential mortgage loans held for sale	75,272	192,295
Loans and Leases Receivable, Gross	22,557,150	20,205,680
Allowance for loan losses	(235,704)	(256,421)
Loans, net of allowance	22,321,446	19,949,259
Mortgage servicing rights	277,608	163,198	$ 101,172	$ 201,886
Derivative contracts, net of cash margin, Assets, Fair Value	880,343	1,097,297
Time deposits	1,461,842	1,704,328
Subordinated debentures	131,205	131,226
Derivative contracts, net of cash margin, Liabilities, Fair Value	554,900	275,625
Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	14,198,187	12,506,465
Allowance for loan losses	(131,586)	(162,056)
Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	4,606,777	3,831,325
Allowance for loan losses	(57,648)	(58,553)
Paycheck Protection Program
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	14,312	276,341
Allowance for loan losses	0	0
Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,737,874	3,591,549
Allowance for loan losses	(46,470)	(35,812)
U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	9,823	23,610
Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,406,848	9,068,900
Debt Securities, Held-to-maturity, gross	2,538,565	6,939
Available for sale securities	5,814,496	8,006,616
Fair value option securities	296,590	43,770
Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	21,484	25,783
Debt Securities, Held-to-maturity, gross	170,629	203,772
Available for sale securities	624,500	508,365
U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	898	1,000
Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	577,576	24,339
Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	17,259
Available for sale securities	4,475,917	4,617,025
Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	26,006	18,520
Debt Securities, Held-to-maturity, gross	12,788	288
Available for sale securities	473	472
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	943,810	712,067
Interest-bearing cash and cash equivalents	457,906	2,125,343
Trading securities	4,464,161	9,136,813
Debt Securities, Held-to-maturity, gross	2,514,245	210,999
Debt Securities, Held-to-maturity, Allowance for Credit Loss	(558)	(555)
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	2,513,687	210,444
Available for sale securities	11,493,860	13,157,817
Fair value option securities	296,590	43,770
Residential mortgage loans held for sale	75,272	192,295
Loans and Leases Receivable, Gross	22,557,150	20,205,680
Allowance for loan losses	(235,704)	(256,421)
Loans, net of allowance	22,321,446	19,949,259
Mortgage servicing rights	277,608	163,198
Derivative contracts, net of cash margin, Assets, Fair Value	880,343	1,097,297
Deposits with no stated maturity	33,018,863	39,537,731
Time deposits	1,461,842	1,704,328
Other borrowed funds	7,007,285	2,363,202
Subordinated debentures	131,205	131,226
Derivative contracts, net of cash margin, Liabilities, Fair Value	554,900	275,625
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	14,198,187	12,506,465
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	4,606,777	3,831,325
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Paycheck Protection Program
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	14,312	276,341
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,737,874	3,591,549
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	9,823	23,610
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,406,848	9,068,900
Debt Securities, Held-to-maturity, gross	2,315,219	6,939
Available for sale securities	5,814,496	8,006,616
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	21,484	25,783
Debt Securities, Held-to-maturity, gross	170,629	203,772
Available for sale securities	624,500	508,365
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	26,006	18,520
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	898	1,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	577,576	24,339
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	15,609
Available for sale securities	4,475,917	4,617,025
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	12,788	288
Available for sale securities	473	472
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	943,810	712,067
Interest-bearing cash and cash equivalents	457,906	2,125,343
Trading securities	4,464,161	9,136,813
Debt Securities, Held-to-maturity, gross	2,346,768	231,395
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	2,346,768	231,395
Available for sale securities	11,493,860	13,157,817
Fair value option securities	296,590	43,770
Residential mortgage loans held for sale	75,272	192,295
Loans and Leases Receivable, Gross	21,891,223	20,039,221
Allowance for loan losses	0	0
Loans, net of allowance	21,891,223	20,039,221
Mortgage servicing rights	277,608	163,198
Derivative contracts, net of cash margin, Assets, Fair Value	880,343	1,097,297
Deposits with no stated maturity	33,018,863	39,537,731
Time deposits	1,431,245	1,703,886
Other borrowed funds	7,005,305	2,360,746
Subordinated debentures	121,497	141,761
Derivative contracts, net of cash margin, Liabilities, Fair Value	554,900	275,625
Estimate of Fair Value Measurement [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	13,891,453	12,395,664
Estimate of Fair Value Measurement [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	4,454,048	3,786,767
Estimate of Fair Value Measurement [Member] | Paycheck Protection Program
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	14,312	269,912
Estimate of Fair Value Measurement [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,531,410	3,586,878
Estimate of Fair Value Measurement [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	9,823	23,610
Estimate of Fair Value Measurement [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,406,848	9,068,900
Debt Securities, Held-to-maturity, gross	2,143,360	7,500
Available for sale securities	5,814,496	8,006,616
Estimate of Fair Value Measurement [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	21,484	25,783
Debt Securities, Held-to-maturity, gross	176,621	223,609
Available for sale securities	624,500	508,365
Estimate of Fair Value Measurement [Member] | Other trading securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	26,006	18,520
Estimate of Fair Value Measurement [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	898	1,000
Estimate of Fair Value Measurement [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	577,576	24,339
Estimate of Fair Value Measurement [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,588
Available for sale securities	4,475,917	4,617,025
Estimate of Fair Value Measurement [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	12,199	286
Available for sale securities	473	472
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	943,810	712,067
Interest-bearing cash and cash equivalents	457,906	2,125,343
Trading securities	4,970	4,999
Debt Securities, Held-to-maturity, gross	0	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	0	0
Available for sale securities	898	1,000
Fair value option securities	0	0
Residential mortgage loans held for sale	0	0
Loans and Leases Receivable, Gross	0	0
Allowance for loan losses	0	0
Loans, net of allowance	0	0
Mortgage servicing rights	0	0
Derivative contracts, net of cash margin, Assets, Fair Value	2,110	8,331
Deposits with no stated maturity	0	0
Time deposits	0	0
Other borrowed funds	0	0
Subordinated debentures	0	0
Derivative contracts, net of cash margin, Liabilities, Fair Value	16	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Paycheck Protection Program
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,970	4,999
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Debt Securities, Held-to-maturity, gross	0	0
Available for sale securities	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Debt Securities, Held-to-maturity, gross	0	0
Available for sale securities	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Other trading securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	898	1,000
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0
Available for sale securities	0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0	0
Available for sale securities	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-bearing cash and cash equivalents	0	0
Trading securities	4,459,191	9,131,814
Debt Securities, Held-to-maturity, gross	2,208,253	65,484
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	2,208,253	65,484
Available for sale securities	11,492,489	13,156,345
Fair value option securities	296,590	43,770
Residential mortgage loans held for sale	68,054	185,969
Loans and Leases Receivable, Gross	0	0
Allowance for loan losses	0	0
Loans, net of allowance	0	0
Mortgage servicing rights	0	0
Derivative contracts, net of cash margin, Assets, Fair Value	878,233	1,088,966
Deposits with no stated maturity	0	0
Time deposits	0	0
Other borrowed funds	0	0
Subordinated debentures	121,497	141,761
Derivative contracts, net of cash margin, Liabilities, Fair Value	554,884	275,625
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Paycheck Protection Program
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,853	18,611
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	4,406,848	9,068,900
Debt Securities, Held-to-maturity, gross	2,143,360	7,500
Available for sale securities	5,814,496	8,006,616
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	21,484	25,783
Debt Securities, Held-to-maturity, gross	38,106	57,698
Available for sale securities	624,500	508,365
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Other trading securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	26,006	18,520
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	577,576	24,339
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	14,588
Available for sale securities	4,475,917	4,617,025
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	12,199	286
Available for sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-bearing cash and cash equivalents	0	0
Trading securities	0	0
Debt Securities, Held-to-maturity, gross	138,515	165,911
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	138,515	165,911
Available for sale securities	473	472
Fair value option securities	0	0
Residential mortgage loans held for sale	7,218	6,326
Loans and Leases Receivable, Gross	21,891,223	20,039,221
Allowance for loan losses	0	0
Loans, net of allowance	21,891,223	20,039,221
Mortgage servicing rights	277,608	163,198
Derivative contracts, net of cash margin, Assets, Fair Value	0	0
Deposits with no stated maturity	33,018,863	39,537,731
Time deposits	1,431,245	1,703,886
Other borrowed funds	7,005,305	2,360,746
Subordinated debentures	0	0
Derivative contracts, net of cash margin, Liabilities, Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Commercial [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	13,891,453	12,395,664
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Commercial real estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	4,454,048	3,786,767
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Paycheck Protection Program
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	14,312	269,912
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Loans to individuals [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans and Leases Receivable, Gross	3,531,410	3,586,878
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | U.S. government securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Residential agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Debt Securities, Held-to-maturity, gross	0	0
Available for sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Municipal securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Debt Securities, Held-to-maturity, gross	138,515	165,911
Available for sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Other trading securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | U.S. Treasury [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Residential non-agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Commercial agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0
Available for sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Other debt securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Securities, Held-to-maturity, gross	0	0
Available for sale securities	$ 473	$ 472