CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $)	Total USD ($)	Convertible Preferred Stock USD ($)	Common Stock USD ($)	Common Stock Restricted Stock	Common Stock Stock Options	Additional Paid-in Capital USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive Income (Loss), Net of Income Tax USD ($)	Treasury Stock USD ($)	Comprehensive Income USD ($)
Stockholders' Equity at Jun. 30, 2009	$ 88,939,000	$ 9,830,000	$ 87,000			$ 61,320,000	$ 19,365,000	$ 1,926,000	$ (3,589,000)
Common Stock, Shares, Outstanding at Jun. 30, 2009	8,082,768		8,082,768
Convertible Preferred Stock, shares outstanding at Jun. 30, 2009		5,305
Common Stock, Shares, Issued at Jun. 30, 2009	8,706,075		8,706,075
Treasury Stock, Shares at Jun. 30, 2009			(623,307)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,128,000						21,128,000			21,128,000
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent								2,117,000
Net unrealized gain from investment securities - net of income tax expense	2,117,000									2,117,000
Comprehensive income	23,245,000									23,245,000
Cash dividends on preferred stock	(611,000)						(611,000)
Issuance of stock, shares issued			1,226,276
Issuance of common stock, shares outstanding			1,226,276
Stock Issued During Period, Value, New Issues			12,000
Issuance of common stock	15,094,000					15,082,000
Convert preferred stock to common stock, shares		(4,790)	531,690
Convert preferred stock to common stock		(4,767,000)	6,000			4,761,000
Convert preferred stock to common stock, shares outstanding			531,690
Stock-based compensation expense	866,000					866,000
Restricted stock grants, issued			56,575
Shares repurchased to fund employees' income tax liabilities from stock based compensation			(2,063)	(17,328)	(2,063)
Restricted stock grants, shares outstanding			39,247
Restricted stock grants	(108,000)					181,000			(289,000)
Stock option exercises and tax benefits of equity compensation, shares issued	266,708		307,057
Stock option exercises and tax benefits of equity compensation, shares outstanding			304,994
Stock option exercises and tax benefits of equity compensation	2,383,000		3,000			2,395,000			(15,000)
Stockholders' Equity at Jun. 30, 2010	129,808,000	5,063,000	108,000			84,605,000	39,882,000	4,043,000	(3,893,000)
Common Stock, Shares, Outstanding at Jun. 30, 2010	10,184,975		10,184,975
Convertible Preferred Stock, shares outstanding at Jun. 30, 2010		515
Common Stock, Shares, Issued at Jun. 30, 2010	10,827,673		10,827,673
Treasury Stock, Shares at Jun. 30, 2010			(642,698)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,579,000						20,579,000			20,579,000
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent								(5,014,000)
Net unrealized gain from investment securities - net of income tax expense	(5,014,000)									(5,014,000)
Comprehensive income	15,565,000									15,565,000
Cash dividends on preferred stock	(309,000)						(309,000)
Issuance of stock, shares issued			0
Issuance of common stock, shares outstanding			0
Convert preferred stock to common stock, shares			0
Convert preferred stock to common stock, shares outstanding			0
Stock-based compensation expense	2,153,000					2,153,000
Restricted stock grants, issued			195,909
Shares repurchased to fund employees' income tax liabilities from stock based compensation				(72,933)
Restricted stock grants, shares outstanding			122,976
Restricted stock grants	(723,000)		3,000			314,000			(1,040,000)
Stock option exercises and tax benefits of equity compensation, shares issued	128,381		128,381
Stock option exercises and tax benefits of equity compensation, shares outstanding			128,381
Stock option exercises and tax benefits of equity compensation	1,272,000		1,000			1,271,000			0
Stockholders' Equity at Jun. 30, 2011	147,766,000	5,063,000	112,000			88,343,000	60,152,000	(971,000)	(4,933,000)
Common Stock, Shares, Issued at Jun. 30, 2011	11,151,963		11,151,963
Common Stock, Shares, Outstanding at Jun. 30, 2011	10,436,332		10,436,332
Treasury Stock, Shares at Jun. 30, 2011	(715,631)		(715,631)
Convertible Preferred Stock, shares outstanding at Jun. 30, 2011		515
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,476,000						29,476,000			29,476,000
Net unrealized gain from investment securities - net of income tax expense	(4,464,000)							(4,464,000)		(4,464,000)
Comprehensive income	25,012,000									25,012,000
Cash dividends on preferred stock	(1,271,000)						(1,271,000)
Issuance of stock, shares issued		20,182	862,500
Issuance of common stock, shares outstanding			862,500
Stock Issued During Period, Value, New Issues	19,487,000	19,487,000
Issuance of common stock	13,344,000		9,000			13,335,000
Convert preferred stock to common stock, shares		(50)	3,096
Convert preferred stock to common stock		(48,000)	1,000			47,000
Convert preferred stock to common stock, shares outstanding			3,096
Stock-based compensation expense	2,493,000					2,493,000
Restricted stock grants, issued			229,497
Shares repurchased to fund employees' income tax liabilities from stock based compensation				(93,411)
Restricted stock grants, shares outstanding			136,086
Restricted stock grants	(1,017,000)		1,000			659,000			(1,677,000)
Stock option exercises and tax benefits of equity compensation, shares issued	74,522		74,522
Stock option exercises and tax benefits of equity compensation, shares outstanding			74,522
Stock option exercises and tax benefits of equity compensation	806,000		0			806,000			0
Stockholders' Equity at Jun. 30, 2012	$ 206,620,000	$ 24,502,000	$ 123,000			$ 105,683,000	$ 88,357,000	$ (5,435,000)	$ (6,610,000)
Common Stock, Shares, Outstanding at Jun. 30, 2012	11,512,536		11,512,536
Convertible Preferred Stock, shares outstanding at Jun. 30, 2012		20,647
Common Stock, Shares, Issued at Jun. 30, 2012	12,321,578		12,321,578
Treasury Stock, Shares at Jun. 30, 2012	(809,042)		(809,042)