3. Loans, Impaired (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Impaired loans
Unpaid Contractual Principal Balance	$ 45,963		$ 45,963		$ 55,717
Recorded Investment With No Allowance	11,305		11,305		17,477
Recorded Investment With Allowance	29,938		29,938		30,797
Recorded Investment in Impaired Loans	41,243		41,243		48,274
Related Allowance	1,504		1,504		1,536
Average Outstanding Impaired Loans	41,602	48,402	43,748	49,417	48,357
Construction and land development
Impaired loans
Unpaid Contractual Principal Balance	10,399		10,399		17,738
Recorded Investment With No Allowance	6,705		6,705		11,795
Recorded Investment With Allowance	923		923		680
Recorded Investment in Impaired Loans	7,628		7,628		12,475
Related Allowance	61		61		61
Average Outstanding Impaired Loans	7,902	12,318	8,954	13,806	12,810
Single-family residential
Impaired loans
Unpaid Contractual Principal Balance	8,705		8,705		9,099
Recorded Investment With No Allowance	1,228		1,228		766
Recorded Investment With Allowance	6,828		6,828		7,799
Recorded Investment in Impaired Loans	8,056		8,056		8,565
Related Allowance	161		161		177
Average Outstanding Impaired Loans	7,965	7,320	8,404	7,868	7,590
Single-family residential - Banco de la Gente stated income
Impaired loans
Unpaid Contractual Principal Balance	21,651		21,651		21,806
Recorded Investment With No Allowance	0		0		0
Recorded Investment With Allowance	20,775		20,775		21,000
Recorded Investment in Impaired Loans	20,775		20,775		21,000
Related Allowance	1,259		1,259		1,278
Average Outstanding Impaired Loans	20,780	21,038	20,904	20,752	21,158
Commercial Real Estate
Impaired loans
Unpaid Contractual Principal Balance	4,063		4,063		5,830
Recorded Investment With No Allowance	3,100		3,100		4,569
Recorded Investment With Allowance	556		556		467
Recorded Investment in Impaired Loans	3,656		3,656		5,036
Related Allowance	8		8		6
Average Outstanding Impaired Loans	3,753	6,317	4,297	5,565	5,433
Multifamily and Farmland
Impaired loans
Unpaid Contractual Principal Balance	185		185		193
Recorded Investment With No Allowance	0		0		0
Recorded Investment With Allowance	185		185		193
Recorded Investment in Impaired Loans	185		185		193
Related Allowance	3		3		1
Average Outstanding Impaired Loans	185	200	188	201	200
Total real estate loans
Impaired loans
Unpaid Contractual Principal Balance	45,003		45,003		54,666
Recorded Investment With No Allowance	11,033		11,033		17,130
Recorded Investment With Allowance	29,267		29,267		30,139
Recorded Investment in Impaired Loans	40,300		40,300		47,269
Related Allowance	1,492		1,492		1,523
Average Outstanding Impaired Loans	40,585	47,193	42,747	48,192	47,191
Commercial loans (not secured by real estate)
Impaired loans
Unpaid Contractual Principal Balance	643		643		983
Recorded Investment With No Allowance	0		0		347
Recorded Investment With Allowance	628		628		592
Recorded Investment in Impaired Loans	628		628		939
Related Allowance	11		11		12
Average Outstanding Impaired Loans	701	1,186	816	1,187	1,125
Consumer loans (not secured by real estate)
Impaired loans
Unpaid Contractual Principal Balance	317		317		68
Recorded Investment With No Allowance	272		272		0
Recorded Investment With Allowance	43		43		66
Recorded Investment in Impaired Loans	315		315		66
Related Allowance	1		1		1
Average Outstanding Impaired Loans	$ 316	$ 23	$ 185	$ 38	$ 41