Statement of Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid in Capital	Retained Earnings	Unallocated ESOP Shares	Accumulated Other Comprensive Income (Loss)	Treasury Stock
Stockholder's Equity Beginning Balance at Dec. 31, 2008	$ 125,802,000	$ 14,729,000	$ 163,215,000	$ 25,454,000	$ (2,572,000)	$ (9,404,000)	$ (65,620,000)
Net Income	21,792,000	0	0	21,792,000	0	0	0
Other Comprehensive (Loss) Income	2,764,000					2,764,000
3% Stock Dividend	0	441,000	12,065,000	(12,506,000)	0	0	0
Cash Dividends Paid	(10,640,000)	0	0	(10,640,000)	0	0	0
Stock Options Exercised	1,178,000	0	545,000	0	0	0	633,000
Shares Issued Under the Directors' Stock Purchase Plan	116,000	0	76,000	0	0	0	40,000
Shares Issued Under the Employee Stock Purchase Plan	466,000	0	302,000	0	0	0	164,000
Shares Issued for Dividend Reinvestment Plans	1,658,000	0	1,083,000	0	0	0	575,000
Stock-Based Compensation Expense	189,000	0	189,000	0	0	0	0
Tax Benefit for Disposition of Stock Options	193,000	0	193,000	0	0	0	0
Purchases of Treasury Stock	(3,761,000)	0	0	0	0	0	(3,761,000)
Shares Issued for Acquisition of Subsidiary	542,000	0	373,000	0	0	0	169,000
Acquisition by ESOP of Arrow Stock	0
Allocation of ESOP Stock	519,000	0	151,000	0	368,000	0	0
Stockholder's Equity Ending Balance at Dec. 31, 2009	140,818,000	15,170,000	178,192,000	24,100,000	(2,204,000)	(6,640,000)	(67,800,000)
Net Income	21,892,000	0	0	21,892,000	0	0	0
Other Comprehensive (Loss) Income	217,000					217,000
3% Stock Dividend	0	456,000	9,962,000	(10,418,000)	0	0	0
Cash Dividends Paid	(10,997,000)	0	0	(10,997,000)	0	0	0
Stock Options Exercised	798,000	0	352,000	0	0	0	446,000
Shares Issued Under the Directors' Stock Purchase Plan	149,000	0	101,000	0	0	0	48,000
Shares Issued Under the Employee Stock Purchase Plan	475,000	0	310,000	0	0	0	165,000
Shares Issued for Dividend Reinvestment Plans	1,715,000	0	1,163,000	0	0	0	552,000
Stock-Based Compensation Expense	299,000	0	299,000	0	0	0	0
Tax Benefit for Disposition of Stock Options	105,000	0	105,000	0	0	0	0
Purchases of Treasury Stock	(3,347,000)	0	0	0	0	0	(3,347,000)
Shares Issued for Acquisition of Subsidiary	682,000	0	459,000	0	0	0	223,000
Acquisition by ESOP of Arrow Stock	(1,000,000)	0	0	0	(1,000,000)	0	0
Allocation of ESOP Stock	453,000	0	125,000	0	328,000	0	0
Stockholder's Equity Ending Balance at Dec. 31, 2010	152,259,000	15,626,000	191,068,000	24,577,000	(2,876,000)	(6,423,000)	(69,713,000)
Net Income	21,933,000	0	0	21,933,000	0	0	0
Other Comprehensive (Loss) Income	(272,000)					(272,000)
3% Stock Dividend	0	468,000	10,647,000	(11,115,000)	0	0	0
Cash Dividends Paid	(11,448,000)	0	0	(11,448,000)	0	0	0
Stock Options Exercised	1,413,000	0	705,000	0	0	0	708,000
Shares Issued Under the Directors' Stock Purchase Plan	175,000	0	104,000	0	0	0	71,000
Shares Issued Under the Employee Stock Purchase Plan	474,000	0	282,000	0	0	0	192,000
Shares Issued for Dividend Reinvestment Plans	1,796,000	0	1,062,000	0	0	0	734,000
Stock-Based Compensation Expense	354,000	0	354,000	0	0	0	0
Tax Benefit for Disposition of Stock Options	51,000	0	51,000	0	0	0	0
Purchases of Treasury Stock	(6,039,000)	0	0	0	0	0	(6,039,000)
Shares Issued for Acquisition of Subsidiary	5,261,000	0	3,275,000	0	0	0	1,986,000
Acquisition by ESOP of Arrow Stock	0
Allocation of ESOP Stock	428,000	0	52,000	0	376,000	0	0
Stockholder's Equity Ending Balance at Dec. 31, 2011	$ 166,385,000	$ 16,094,000	$ 207,600,000	$ 23,947,000	$ (2,500,000)	$ (6,695,000)	$ (72,061,000)