Loans (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Grades 1,3,6
Loans
Loans receivable	$ 1,586,827,000	$ 1,594,150,000
Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	1,407,445,000	1,419,453,000
Grades 1,3,6 | Florida
Loans
Loans receivable	179,382,000	174,697,000
Grade 7
Loans
Loans receivable	219,233,000	209,424,000
Grade 7 | Illinois/Indiana
Loans
Loans receivable	178,082,000	171,123,000
Grade 7 | Florida
Loans
Loans receivable	41,151,000	38,301,000
Grade 8
Loans
Limit above which loans are quarterly reviewed	500,000
Loans receivable	103,230,000	114,462,000
Grade 8 | Illinois/Indiana
Loans
Loans receivable	73,294,000	84,647,000
Grade 8 | Florida
Loans
Loans receivable	29,936,000	29,815,000
Grade 9
Loans
Loans receivable	96,336,000	88,581,000
Grade 9 | Illinois/Indiana
Loans
Loans receivable	70,922,000	64,299,000
Grade 9 | Florida
Loans
Loans receivable	25,414,000	24,282,000
Grade 10
Loans
Loans receivable	23,001,000	25,104,000
Grade 10 | Illinois/Indiana
Loans
Loans receivable	16,254,000	17,553,000
Grade 10 | Florida
Loans
Loans receivable	6,747,000	7,551,000
Grades 1, 3, 6 and 7
Loans
Loans receivable	1,800,000,000	1,800,000,000
Grades 8, 9, and 10
Loans
Loans receivable	222,600,000	228,100,000
Commercial | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	5.06	4.68
Commercial | Florida
Loans
Weighted Avg. Risk Grade	4.88	5.91
Commercial | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	329,298,000	346,536,000
Commercial | Grades 1,3,6 | Florida
Loans
Loans receivable	7,437,000	6,359,000
Commercial | Grade 7
Loans
Limit above which loans are annually reviewed	500,000
Commercial | Grade 7 | Illinois/Indiana
Loans
Loans receivable	57,158,000	46,201,000
Commercial | Grade 7 | Florida
Loans
Loans receivable	308,000	3,544,000
Commercial | Grade 8 | Illinois/Indiana
Loans
Loans receivable	6,729,000	12,374,000
Commercial | Grade 8 | Florida
Loans
Loans receivable	3,375,000	162,000
Commercial | Grade 9 | Illinois/Indiana
Loans
Loans receivable	18,863,000	15,677,000
Commercial | Grade 9 | Florida
Loans
Loans receivable	839,000	796,000
Commercial | Grade 10 | Illinois/Indiana
Loans
Loans receivable	1,915,000	2,039,000
Commercial real estate | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	5.55	5.53
Commercial real estate | Florida
Loans
Weighted Avg. Risk Grade	6.37	6.36
Commercial real estate | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	653,077,000	644,695,000
Commercial real estate | Grades 1,3,6 | Florida
Loans
Loans receivable	87,297,000	80,232,000
Commercial real estate | Grade 7
Loans
Limit above which loans are quarterly reviewed	406,607,000
Commercial real estate | Grade 7 | Illinois/Indiana
Loans
Loans receivable	406,607,000	110,012,000
Commercial real estate | Grade 7 | Florida
Loans
Loans receivable	24,374,000	20,667,000
Commercial real estate | Grade 8 | Illinois/Indiana
Loans
Loans receivable	46,839,000	50,305,000
Commercial real estate | Grade 8 | Florida
Loans
Loans receivable	11,203,000	13,238,000
Commercial real estate | Grade 9 | Illinois/Indiana
Loans
Loans receivable	30,933,000	28,655,000
Commercial real estate | Grade 9 | Florida
Loans
Loans receivable	20,665,000	19,279,000
Commercial real estate | Grade 10 | Illinois/Indiana
Loans
Loans receivable	8,012,000	9,295,000
Commercial real estate | Grade 10 | Florida
Loans
Loans receivable	3,962,000	4,754,000
Real estate construction
Loans
Limit above which loans are annually reviewed	500,000
Real estate construction | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	7.13	7.21
Real estate construction | Florida
Loans
Weighted Avg. Risk Grade	6.98	6.97
Real estate construction | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	33,937,000	30,710,000
Real estate construction | Grades 1,3,6 | Florida
Loans
Loans receivable	5,058,000	4,137,000
Real estate construction | Grade 7 | Illinois/Indiana
Loans
Loans receivable	7,606,000	7,809,000
Real estate construction | Grade 7 | Florida
Loans
Loans receivable	8,055,000	7,721,000
Real estate construction | Grade 8 | Illinois/Indiana
Loans
Loans receivable	13,485,000	14,162,000
Real estate construction | Grade 8 | Florida
Loans
Loans receivable	2,946,000	3,172,000
Real estate construction | Grade 9 | Illinois/Indiana
Loans
Loans receivable	13,931,000	14,084,000
Real estate construction | Grade 9 | Florida
Loans
Loans receivable	981,000	942,000
Real estate construction | Grade 10 | Illinois/Indiana
Loans
Loans receivable	3,179,000	3,364,000
Retail real estate | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	3.63	3.62
Retail real estate | Florida
Loans
Weighted Avg. Risk Grade	3.96	3.98
Retail real estate | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	378,713,000	385,949,000
Retail real estate | Grades 1,3,6 | Florida
Loans
Loans receivable	79,209,000	83,578,000
Retail real estate | Grade 7 | Illinois/Indiana
Loans
Loans receivable	6,352,000	6,729,000
Retail real estate | Grade 7 | Florida
Loans
Loans receivable	8,414,000	6,369,000
Retail real estate | Grade 8 | Illinois/Indiana
Loans
Loans receivable	6,241,000	7,806,000
Retail real estate | Grade 8 | Florida
Loans
Loans receivable	12,395,000	13,225,000
Retail real estate | Grade 9 | Illinois/Indiana
Loans
Loans receivable	7,188,000	5,874,000
Retail real estate | Grade 9 | Florida
Loans
Loans receivable	2,929,000	3,265,000
Retail real estate | Grade 10 | Illinois/Indiana
Loans
Loans receivable	3,148,000	2,855,000
Retail real estate | Grade 10 | Florida
Loans
Loans receivable	2,785,000	2,797,000
Retail other | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	3.40	3.34
Retail other | Florida
Loans
Weighted Avg. Risk Grade	2.44	2.80
Retail other | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	12,420,000	11,563,000
Retail other | Grades 1,3,6 | Florida
Loans
Loans receivable	381,000	391,000
Retail other | Grade 7 | Illinois/Indiana
Loans
Loans receivable	359,000	372,000
Retail other | Grade 8 | Florida
Loans
Loans receivable	17,000	18,000
Retail other | Grade 9 | Illinois/Indiana
Loans
Loans receivable	$ 7,000	$ 9,000