BANNER CORPORATION AND SUBSIDIARIES - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, except Share data	Preferred Stock	Common Stock and Paid in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity
Balance at beginning of period shares at Dec. 31, 2010	124,000	16,130,441
Balance at beginning of period amount at Dec. 31, 2010	$ 119,000	$ 507,470	$ (115,348)	$ 350	$ 511,472
Net income (loss)			5,457		5,457
Change in valuation of securities, available-for-sale, net of income tax				1,685	1,685
Amortization of unrealized loss on tax exempt securities transferred from available-for-sale to held-to-maturity, net of income taxes				16	16
Accretion of preferred stock discount amount	1,701		(1,701)
Accrual of dividends on preferred stock			(6,200)		(6,200)
Accrual of dividends on common stock			(1,673)		(1,673)
Proceeds from issuance of common stock for stockholder reinvestment program shares		1,372,625
Proceeds from issuance of common stock for stockholder reinvestment program amount		21,556			21,556
Amortization of compensation related to restricted stock grant shares		16,066
Amortization of compensation related to restricted stock grant amount		111			111
Amortization of compensation related to stock options amount		25			25
Other amount	1				1
Balance at end of period shares at Dec. 31, 2011	124,000	17,519,132
Balance at end of period amount at Dec. 31, 2011	120,702	529,162	(119,465)	2,051	532,450
Balance at beginning of period amount at Dec. 31, 2011	120,702	529,162	(119,465)	2,051	532,450
Net income (loss)			9,184		9,184
Change in valuation of securities, available-for-sale, net of income tax				(35)	(35)
Amortization of unrealized loss on tax exempt securities transferred from available-for-sale to held-to-maturity, net of income taxes				2	2
Accretion of preferred stock discount amount	454		(454)
Accrual of dividends on preferred stock			(1,550)		(1,550)
Accrual of dividends on common stock			(180)		(180)
Proceeds from issuance of common stock for stockholder reinvestment program shares		474,296
Proceeds from issuance of common stock for stockholder reinvestment program amount		8,874			8,874
Amortization of compensation related to restricted stock grant amount		42			42
Amortization of compensation related to stock options amount		3			3
Balance at end of period shares at Mar. 31, 2012	124,000	17,993,428
Balance at end of period amount at Mar. 31, 2012	$ 121,156	$ 538,081	$ (112,465)	$ 2,018	$ 548,790