Loans (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Grades 1, 3, 6 and 7
Loans
Loans receivable	$ 2,100,000,000	$ 2,100,000,000
Grades 8, 9, and 10
Loans
Loans receivable	151,500,000	161,900,000
Increase or decrease in loans receivable	(10,400,000)
Grades 1,3,6
Loans
Loans receivable	1,897,342,000	1,928,794,000
Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	1,674,815,000	1,710,039,000
Grades 1,3,6 | Florida
Loans
Loans receivable	222,527,000	218,755,000
Grade 7
Loans
Loans receivable	175,042,000	188,741,000
Grade 7 | Illinois/Indiana
Loans
Loans receivable	139,464,000	152,084,000
Grade 7 | Florida
Loans
Loans receivable	35,578,000	36,657,000
Grade 8
Loans
Limit above which loans are quarterly reviewed	500,000
Loans receivable	77,836,000	77,253,000
Grade 8 | Illinois/Indiana
Loans
Loans receivable	53,319,000	52,625,000
Grade 8 | Florida
Loans
Loans receivable	24,517,000	24,628,000
Grade 9
Loans
Loans receivable	59,351,000	67,531,000
Grade 9 | Illinois/Indiana
Loans
Loans receivable	42,344,000	50,240,000
Grade 9 | Florida
Loans
Loans receivable	17,007,000	17,291,000
Grade 10
Loans
Loans receivable	14,340,000	17,164,000
Grade 10 | Illinois/Indiana
Loans
Loans receivable	11,175,000	13,370,000
Grade 10 | Florida
Loans
Loans receivable	3,165,000	3,794,000
Commercial | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	4.66	4.66
Commercial | Florida
Loans
Weighted Avg. Risk Grade	5.78	5.89
Commercial | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	439,328,000	487,587,000
Commercial | Grades 1,3,6 | Florida
Loans
Loans receivable	23,559,000	16,460,000
Commercial | Grade 7
Loans
Limit above which loans are annually reviewed	500,000
Commercial | Grade 7 | Illinois/Indiana
Loans
Loans receivable	43,161,000	46,992,000
Commercial | Grade 7 | Florida
Loans
Loans receivable	79,000	174,000
Commercial | Grade 8 | Illinois/Indiana
Loans
Loans receivable	9,724,000	15,986,000
Commercial | Grade 8 | Florida
Loans
Loans receivable	3,186,000	3,218,000
Commercial | Grade 9 | Illinois/Indiana
Loans
Loans receivable	10,514,000	8,536,000
Commercial | Grade 9 | Florida
Loans
Loans receivable	680,000	684,000
Commercial | Grade 10 | Illinois/Indiana
Loans
Loans receivable	1,604,000	975,000
Commercial | Grade 10 | Florida
Loans
Loans receivable	10,000
Commercial real estate | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	5.57	5.55
Commercial real estate | Florida
Loans
Weighted Avg. Risk Grade	6.05	6.02
Commercial real estate | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	792,255,000	799,117,000
Commercial real estate | Grades 1,3,6 | Florida
Loans
Loans receivable	112,870,000	116,741,000
Commercial real estate | Grade 7
Loans
Limit above which loans are annually reviewed	500,000
Commercial real estate | Grade 7 | Illinois/Indiana
Loans
Loans receivable	70,087,000	79,371,000
Commercial real estate | Grade 7 | Florida
Loans
Loans receivable	23,344,000	16,470,000
Commercial real estate | Grade 8 | Illinois/Indiana
Loans
Loans receivable	26,888,000	19,327,000
Commercial real estate | Grade 8 | Florida
Loans
Loans receivable	10,849,000	11,250,000
Commercial real estate | Grade 9 | Illinois/Indiana
Loans
Loans receivable	20,261,000	29,606,000
Commercial real estate | Grade 9 | Florida
Loans
Loans receivable	12,992,000	12,721,000
Commercial real estate | Grade 10 | Illinois/Indiana
Loans
Loans receivable	4,562,000	4,597,000
Commercial real estate | Grade 10 | Florida
Loans
Loans receivable	2,618,000	3,073,000
Real estate construction
Loans
Limit above which loans are quarterly reviewed	500,000
Real estate construction | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	7.06	7.11
Real estate construction | Florida
Loans
Weighted Avg. Risk Grade	6.29	6.64
Real estate construction | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	24,562,000	21,585,000
Real estate construction | Grades 1,3,6 | Florida
Loans
Loans receivable	9,442,000	7,886,000
Real estate construction | Grade 7 | Illinois/Indiana
Loans
Loans receivable	16,792,000	16,376,000
Real estate construction | Grade 7 | Florida
Loans
Loans receivable		7,961,000
Real estate construction | Grade 8 | Illinois/Indiana
Loans
Loans receivable	11,695,000	11,920,000
Real estate construction | Grade 8 | Florida
Loans
Loans receivable	724,000	743,000
Real estate construction | Grade 9 | Illinois/Indiana
Loans
Loans receivable	7,567,000	7,686,000
Real estate construction | Grade 9 | Florida
Loans
Loans receivable	828,000	836,000
Real estate construction | Grade 10 | Illinois/Indiana
Loans
Loans receivable	3,376,000	3,862,000
Retail real estate | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	3.44	3.53
Retail real estate | Florida
Loans
Weighted Avg. Risk Grade	3.82	3.85
Retail real estate | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	410,802,000	393,299,000
Retail real estate | Grades 1,3,6 | Florida
Loans
Loans receivable	76,137,000	77,116,000
Retail real estate | Grade 7 | Illinois/Indiana
Loans
Loans receivable	9,359,000	9,285,000
Retail real estate | Grade 7 | Florida
Loans
Loans receivable	12,155,000	12,052,000
Retail real estate | Grade 8 | Illinois/Indiana
Loans
Loans receivable	5,012,000	5,392,000
Retail real estate | Grade 8 | Florida
Loans
Loans receivable	9,758,000	9,417,000
Retail real estate | Grade 9 | Illinois/Indiana
Loans
Loans receivable	3,999,000	4,408,000
Retail real estate | Grade 9 | Florida
Loans
Loans receivable	2,507,000	3,050,000
Retail real estate | Grade 10 | Illinois/Indiana
Loans
Loans receivable	1,633,000	3,936,000
Retail real estate | Grade 10 | Florida
Loans
Loans receivable	537,000	721,000
Retail other | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	2.63	2.64
Retail other | Florida
Loans
Weighted Avg. Risk Grade	1.57	1.72
Retail other | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	7,868,000	8,451,000
Retail other | Grades 1,3,6 | Florida
Loans
Loans receivable	519,000	552,000
Retail other | Grade 7 | Illinois/Indiana
Loans
Loans receivable	65,000	60,000
Retail other | Grade 9 | Illinois/Indiana
Loans
Loans receivable	$ 3,000	$ 4,000