Loans (Details 2) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Grades 1,3,6
Loans
Loans receivable	$ 1,709,892,000	$ 1,594,150,000
Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	1,516,464,000	1,419,453,000
Grades 1,3,6 | Florida
Loans
Loans receivable	193,428,000	174,697,000
Grade 7
Loans
Loans receivable	208,400,000	209,424,000
Grade 7 | Illinois/Indiana
Loans
Loans receivable	167,866,000	171,123,000
Grade 7 | Florida
Loans
Loans receivable	40,534,000	38,301,000
Grade 8
Loans
Limit above which loans are quarterly reviewed	500,000
Loans receivable	93,534,000	114,462,000
Grade 8 | Illinois/Indiana
Loans
Loans receivable	65,224,000	84,647,000
Grade 8 | Florida
Loans
Loans receivable	28,310,000	29,815,000
Grade 9
Loans
Loans receivable	82,855,000	88,581,000
Grade 9 | Illinois/Indiana
Loans
Loans receivable	58,816,000	64,299,000
Grade 9 | Florida
Loans
Loans receivable	24,039,000	24,282,000
Grade 10
Loans
Loans receivable	20,274,000	25,104,000
Grade 10 | Illinois/Indiana
Loans
Loans receivable	15,259,000	17,553,000
Grade 10 | Florida
Loans
Loans receivable	5,015,000	7,551,000
Grades 1, 3, 6 and 7
Loans
Loans receivable	1,900,000,000	1,800,000,000
Grades 8, 9, and 10
Loans
Loans receivable	196,700,000	228,100,000
Commercial | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	4.76	4.68
Commercial | Florida
Loans
Weighted Avg. Risk Grade	5.63	5.91
Commercial | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	417,017,000	346,536,000
Commercial | Grades 1,3,6 | Florida
Loans
Loans receivable	8,924,000	6,359,000
Commercial | Grade 7
Loans
Limit above which loans are annually reviewed	500,000
Commercial | Grade 7 | Illinois/Indiana
Loans
Loans receivable	54,420,000	46,201,000
Commercial | Grade 7 | Florida
Loans
Loans receivable	299,000	3,544,000
Commercial | Grade 8 | Illinois/Indiana
Loans
Loans receivable	8,689,000	12,374,000
Commercial | Grade 8 | Florida
Loans
Loans receivable	3,323,000	162,000
Commercial | Grade 9 | Illinois/Indiana
Loans
Loans receivable	14,859,000	15,677,000
Commercial | Grade 9 | Florida
Loans
Loans receivable	814,000	796,000
Commercial | Grade 10 | Illinois/Indiana
Loans
Loans receivable	1,311,000	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	6.32	6.36
Commercial real estate | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	671,048,000	644,695,000
Commercial real estate | Grades 1,3,6 | Florida
Loans
Loans receivable	96,866,000	80,232,000
Commercial real estate | Grade 7 | Illinois/Indiana
Loans
Loans receivable	87,602,000	110,012,000
Commercial real estate | Grade 7 | Florida
Loans
Loans receivable	23,457,000	20,667,000
Commercial real estate | Grade 8 | Illinois/Indiana
Loans
Loans receivable	37,460,000	50,305,000
Commercial real estate | Grade 8 | Florida
Loans
Loans receivable	11,637,000	13,238,000
Commercial real estate | Grade 9 | Illinois/Indiana
Loans
Loans receivable	26,803,000	28,655,000
Commercial real estate | Grade 9 | Florida
Loans
Loans receivable	19,343,000	19,279,000
Commercial real estate | Grade 10 | Illinois/Indiana
Loans
Loans receivable	7,153,000	9,295,000
Commercial real estate | Grade 10 | Florida
Loans
Loans receivable	3,889,000	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	7.28	7.21
Real estate construction | Florida
Loans
Weighted Avg. Risk Grade	6.69	6.97
Real estate construction | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	20,435,000	30,710,000
Real estate construction | Grades 1,3,6 | Florida
Loans
Loans receivable	8,442,000	4,137,000
Real estate construction | Grade 7 | Illinois/Indiana
Loans
Loans receivable	19,265,000	7,809,000
Real estate construction | Grade 7 | Florida
Loans
Loans receivable	8,473,000	7,721,000
Real estate construction | Grade 8 | Illinois/Indiana
Loans
Loans receivable	13,104,000	14,162,000
Real estate construction | Grade 8 | Florida
Loans
Loans receivable	765,000	3,172,000
Real estate construction | Grade 9 | Illinois/Indiana
Loans
Loans receivable	10,758,000	14,084,000
Real estate construction | Grade 9 | Florida
Loans
Loans receivable	969,000	942,000
Real estate construction | Grade 10 | Illinois/Indiana
Loans
Loans receivable	3,226,000	3,364,000
Retail real estate | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	3.59	3.62
Retail real estate | Florida
Loans
Weighted Avg. Risk Grade	3.85	3.98
Retail real estate | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	398,733,000	385,949,000
Retail real estate | Grades 1,3,6 | Florida
Loans
Loans receivable	78,697,000	83,578,000
Retail real estate | Grade 7 | Illinois/Indiana
Loans
Loans receivable	6,239,000	6,729,000
Retail real estate | Grade 7 | Florida
Loans
Loans receivable	8,305,000	6,369,000
Retail real estate | Grade 8 | Illinois/Indiana
Loans
Loans receivable	5,971,000	7,806,000
Retail real estate | Grade 8 | Florida
Loans
Loans receivable	12,585,000	13,225,000
Retail real estate | Grade 9 | Illinois/Indiana
Loans
Loans receivable	6,390,000	5,874,000
Retail real estate | Grade 9 | Florida
Loans
Loans receivable	2,913,000	3,265,000
Retail real estate | Grade 10 | Illinois/Indiana
Loans
Loans receivable	3,569,000	2,855,000
Retail real estate | Grade 10 | Florida
Loans
Loans receivable	1,126,000	2,797,000
Retail other | Illinois/Indiana
Loans
Weighted Avg. Risk Grade	3.29	3.34
Retail other | Florida
Loans
Weighted Avg. Risk Grade	1.71	2.80
Retail other | Grades 1,3,6 | Illinois/Indiana
Loans
Loans receivable	9,231,000	11,563,000
Retail other | Grades 1,3,6 | Florida
Loans
Loans receivable	499,000	391,000
Retail other | Grade 7 | Illinois/Indiana
Loans
Loans receivable	340,000	372,000
Retail other | Grade 8 | Florida
Loans
Loans receivable		18,000
Retail other | Grade 9 | Illinois/Indiana
Loans
Loans receivable	$ 6,000	$ 9,000