Deposits: Schedule of Deposits (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Time Deposits 0.00% - 1.99%	$ 1,356,950	$ 1,060,841
Time Deposits 2.00% - 2.99%	123,531	158,696
Time Deposits 3.00% - 3.99%	14,621	17,228
Time Deposits 4.00% - 4.99%	24,146	26,526
Time Deposits 5.00% and above	2,706	5,708
Total time deposits (1.11% - 1.29%)	1,521,954	1,268,999
Noninterest-bearing Domestic Deposit, Demand	342,670	330,813
Interest-bearing demand and savings deposits (0.51% - 0.61%)	1,528,333	1,363,727
Total Deposits	$ 3,392,957	$ 2,963,539