Operating Segment Information

6 Months Ended

Jun. 30, 2011

Operating Segment Information [Abstract]

Operating Segment Information

8)	Operating Segment Information
	Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by management in deciding how to allocate resources and in assessing performance. The Company defines operating segments and evaluates segment performance internally based on individual bank charters, with the exception of GORE. If required, VIEs are consolidated into the operating segment which holds the direct investment in the VIE.
	The accounting policies of the individual operating segments are the same as those of the Company. Transactions between operating segments are conducted at fair value, resulting in profits that are eliminated for reporting consolidated results of operations. Intersegment revenues primarily represents interest income on intercompany borrowings, management fees, and data processing fees received by individual banks or the Parent. Intersegment revenues, expenses and assets are eliminated in order to report results in accordance with accounting principles generally accepted in the United States of America. Expenses for centrally provided services are allocated based on the estimated usage of those services.
	The following schedules provide selected financial data for the Company’s operating segments:

	At or for the Three Months ended June 30, 2011
				Mountain			First															First Bank-
(Dollars in thousands)	Glacier			West			Security			Western			1st Bank			Valley			Big Sky			WY
External revenues	$	17,936			17,682			13,510			8,851			8,089			5,471			4,753			3,850
Intersegment revenues		74			97			19			24			9			67			4			29
Expenses		(16,198	)		(19,764	)		(10,059	)		(6,356	)		(6,119	)		(3,751	)		(3,740	)		(2,980	)
Net earnings (loss)	$	1,812			(1,985	)		3,470			2,519			1,979			1,787			1,017			899
Total assets	$	1,379,298			1,152,583			1,082,737			778,081			756,704			411,619			373,530			373,014

				First Bank-			San
	Citizens			MT			Juans			GORE			Parent			Eliminations			Consolidated
External revenues	$	3,704			2,544			2,610			219			194			—			89,413
Intersegment revenues		12			39			42			—			16,473			(16,889	)		—
Expenses		(2,980	)		(1,639	)		(2,393	)		(801	)		(4,806	)		4,059			(77,527	)
Net earnings (loss)	$	736			944			259			(582	)		11,861			(12,830	)		11,886
Total assets	$	317,280			243,141			226,032			20,318			1,009,907			(1,145,924	)		6,978,320

	At or for the Three Months ended June 30, 2010
				Mountain			First															First Bank-
(Dollars in thousands)	Glacier			West			Security			Western			1st Bank			Valley			Big Sky			WY
External revenues	$	18,969			22,183			13,097			8,811			7,753			5,798			5,099			3,659
Intersegment revenues		48			19			20			123			30			40			1			14
Expenses		(16,407	)		(21,759	)		(10,057	)		(6,686	)		(6,919	)		(3,921	)		(4,397	)		(3,180	)
Net earnings (loss)	$	2,610			443			3,060			2,248			864			1,917			703			493
Total assets	$	1,320,555			1,200,382			932,179			610,208			644,877			368,321			366,439			295,164

				First Bank-			San
	Citizens			MT			Juans			GORE			Parent			Eliminations			Consolidated
External revenues	$	4,608			2,472			2,688			43			56			—			95,236
Intersegment revenues		28			32			24			—			17,885			(18,264	)		—
Expenses		(3,842	)		(1,705	)		(2,135	)		(268	)		(4,719	)		3,981			(82,014	)
Net earnings (loss)	$	794			799			577			(225	)		13,222			(14,283	)		13,222
Total assets	$	271,190			193,806			204,815			19,856			985,895			(1,118,851	)		6,294,836

	At or for the Six Months ended June 30, 2011
				Mountain			First															First Bank-
(Dollars in thousands)	Glacier			West			Security			Western			1st Bank			Valley			Big Sky			WY
External revenues	$	35,270			35,151			26,167			17,045			15,702			10,440			9,494			7,111
Intersegment revenues		140			239			39			79			12			126			7			64
Expenses		(31,239	)		(38,273	)		(20,773	)		(12,661	)		(12,634	)		(7,244	)		(7,522	)		(5,733	)
Net earnings (loss)	$	4,171			(2,883	)		5,433			4,463			3,080			3,322			1,979			1,442
Total assets	$	1,379,298			1,152,583			1,082,737			778,081			756,704			411,619			373,530			373,014

				First Bank-			San												Total
	Citizens			MT			Juans			GORE			Parent			Eliminations			Consolidated
External revenues	$	7,860			4,858			5,239			249			595			—			175,181
Intersegment revenues		30			74			86			—			31,159			(32,055	)		—
Expenses		(6,563	)		(3,120	)		(4,603	)		(1,125	)		(9,668	)		8,148			(153,010	)
Net earnings (loss)	$	1,327			1,812			722			(876	)		22,086			(23,907	)		22,171
Total assets	$	317,280			243,141			226,032			20,318			1,009,907			(1,145,924	)		6,978,320

	At or for the Six Months ended June 30, 2010
				Mountain			First															First Bank-
(Dollars in thousands)	Glacier			West			Security			Western			1st Bank			Valley			Big Sky			WY
External revenues	$	37,704			41,133			25,653			16,939			15,729			10,890			9,935			7,699
Intersegment revenues		96			38			38			255			121			76			1			22
Expenses		(34,142	)		(40,243	)		(20,217	)		(13,003	)		(13,420	)		(7,552	)		(8,901	)		(6,856	)
Net earnings (loss)	$	3,658			928			5,474			4,191			2,430			3,414			1,035			865
Total assets	$	1,320,555			1,200,382			932,179			610,208			644,877			368,321			366,439			295,164

				First Bank-			San												Total
	Citizens			MT			Juans			GORE			Parent			Eliminations			Consolidated
External revenues	$	8,756			4,892			5,325			43			119			—			184,817
Intersegment revenues		28			82			24			—			32,521			(33,302	)		—
Expenses		(7,412	)		(3,396	)		(4,596	)		(268	)		(9,348	)		7,829			(161,525	)
Net earnings (loss)	$	1,372			1,578			753			(225	)		23,292			(25,473	)		23,292
Total assets	$	271,190			193,806			204,815			19,856			985,895			(1,118,851	)		6,294,836