Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) (USD $)																																																																																																																																																			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Real Estate Loans Owner Occupied	Dec. 31, 2011 Real Estate Loans Owner Occupied	Jun. 30, 2012 Real Estate Loans Owner Occupied High Quality	Dec. 31, 2011 Real Estate Loans Owner Occupied High Quality	Jun. 30, 2012 Real Estate Loans Owner Occupied Good Quality	Dec. 31, 2011 Real Estate Loans Owner Occupied Good Quality	Jun. 30, 2012 Real Estate Loans Owner Occupied Satisfactory	Dec. 31, 2011 Real Estate Loans Owner Occupied Satisfactory	Jun. 30, 2012 Real Estate Loans Owner Occupied Merits Attention	Dec. 31, 2011 Real Estate Loans Owner Occupied Merits Attention	Jun. 30, 2012 Real Estate Loans Owner Occupied Special Mention	Dec. 31, 2011 Real Estate Loans Owner Occupied Special Mention	Jun. 30, 2012 Real Estate Loans Owner Occupied Substandard	Dec. 31, 2011 Real Estate Loans Owner Occupied Substandard	Jun. 30, 2012 Real Estate Loans Owner Occupied Substandard Impaired	Dec. 31, 2011 Real Estate Loans Owner Occupied Substandard Impaired	Jun. 30, 2012 Real Estate Loans Owner Occupied Loss	Dec. 31, 2011 Real Estate Loans Owner Occupied Loss	Jun. 30, 2012 Real Estate Loans Non-owner Occupied	Dec. 31, 2011 Real Estate Loans Non-owner Occupied	Jun. 30, 2012 Real Estate Loans Non-owner Occupied High Quality	Dec. 31, 2011 Real Estate Loans Non-owner Occupied High Quality	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Good Quality	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Good Quality	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Satisfactory	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Satisfactory	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Merits Attention	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Merits Attention	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Special Mention	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Special Mention	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Substandard	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Substandard	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Substandard Impaired	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Substandard Impaired	Jun. 30, 2012 Real Estate Loans Non-owner Occupied Loss	Dec. 31, 2011 Real Estate Loans Non-owner Occupied Loss	Jun. 30, 2012 Real Estate Loans One to Four Family	Dec. 31, 2011 Real Estate Loans One to Four Family	Jun. 30, 2012 Real Estate Loans One to Four Family High Quality	Dec. 31, 2011 Real Estate Loans One to Four Family High Quality	Jun. 30, 2012 Real Estate Loans One to Four Family Good Quality	Dec. 31, 2011 Real Estate Loans One to Four Family Good Quality	Jun. 30, 2012 Real Estate Loans One to Four Family Satisfactory	Dec. 31, 2011 Real Estate Loans One to Four Family Satisfactory	Jun. 30, 2012 Real Estate Loans One to Four Family Merits Attention	Dec. 31, 2011 Real Estate Loans One to Four Family Merits Attention	Jun. 30, 2012 Real Estate Loans One to Four Family Special Mention	Dec. 31, 2011 Real Estate Loans One to Four Family Special Mention	Jun. 30, 2012 Real Estate Loans One to Four Family Substandard	Dec. 31, 2011 Real Estate Loans One to Four Family Substandard	Jun. 30, 2012 Real Estate Loans One to Four Family Substandard Impaired	Dec. 31, 2011 Real Estate Loans One to Four Family Substandard Impaired	Jun. 30, 2012 Real Estate Loans One to Four Family Loss	Dec. 31, 2011 Real Estate Loans One to Four Family Loss	Jun. 30, 2012 Real Estate Loans Multifamily	Dec. 31, 2011 Real Estate Loans Multifamily	Jun. 30, 2012 Real Estate Loans Multifamily High Quality	Dec. 31, 2011 Real Estate Loans Multifamily High Quality	Jun. 30, 2012 Real Estate Loans Multifamily Good Quality	Dec. 31, 2011 Real Estate Loans Multifamily Good Quality	Jun. 30, 2012 Real Estate Loans Multifamily Satisfactory	Dec. 31, 2011 Real Estate Loans Multifamily Satisfactory	Jun. 30, 2012 Real Estate Loans Multifamily Merits Attention	Dec. 31, 2011 Real Estate Loans Multifamily Merits Attention	Jun. 30, 2012 Real Estate Loans Multifamily Special Mention	Dec. 31, 2011 Real Estate Loans Multifamily Special Mention	Jun. 30, 2012 Real Estate Loans Multifamily Substandard	Dec. 31, 2011 Real Estate Loans Multifamily Substandard	Jun. 30, 2012 Real Estate Loans Multifamily Substandard Impaired	Dec. 31, 2011 Real Estate Loans Multifamily Substandard Impaired	Jun. 30, 2012 Real Estate Loans Multifamily Loss	Dec. 31, 2011 Real Estate Loans Multifamily Loss	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit High Quality	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit High Quality	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Good Quality	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Good Quality	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Satisfactory	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Satisfactory	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Merits Attention	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Merits Attention	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Special Mention	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Special Mention	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Substandard	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Substandard	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Substandard Impaired	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Substandard Impaired	Jun. 30, 2012 Real Estate Loans Home Equity Lines of Credit Loss	Dec. 31, 2011 Real Estate Loans Home Equity Lines of Credit Loss	Jun. 30, 2012 Real Estate Loans Construction Loans	Dec. 31, 2011 Real Estate Loans Construction Loans	Jun. 30, 2012 Real Estate Loans Construction Loans High Quality	Dec. 31, 2011 Real Estate Loans Construction Loans High Quality	Jun. 30, 2012 Real Estate Loans Construction Loans Good Quality	Dec. 31, 2011 Real Estate Loans Construction Loans Good Quality	Jun. 30, 2012 Real Estate Loans Construction Loans Satisfactory	Dec. 31, 2011 Real Estate Loans Construction Loans Satisfactory	Jun. 30, 2012 Real Estate Loans Construction Loans Merits Attention	Dec. 31, 2011 Real Estate Loans Construction Loans Merits Attention	Jun. 30, 2012 Real Estate Loans Construction Loans Special Mention	Dec. 31, 2011 Real Estate Loans Construction Loans Special Mention	Jun. 30, 2012 Real Estate Loans Construction Loans Substandard	Dec. 31, 2011 Real Estate Loans Construction Loans Substandard	Jun. 30, 2012 Real Estate Loans Construction Loans Substandard Impaired	Dec. 31, 2011 Real Estate Loans Construction Loans Substandard Impaired	Jun. 30, 2012 Real Estate Loans Construction Loans Loss	Dec. 31, 2011 Real Estate Loans Construction Loans Loss	Jun. 30, 2012 Commercial	Dec. 31, 2011 Commercial	Jun. 30, 2012 Commercial High Quality	Dec. 31, 2011 Commercial High Quality	Jun. 30, 2012 Commercial Good Quality	Dec. 31, 2011 Commercial Good Quality	Jun. 30, 2012 Commercial Satisfactory	Dec. 31, 2011 Commercial Satisfactory	Jun. 30, 2012 Commercial Merits Attention	Dec. 31, 2011 Commercial Merits Attention	Jun. 30, 2012 Commercial Special Mention	Dec. 31, 2011 Commercial Special Mention	Jun. 30, 2012 Commercial Substandard	Dec. 31, 2011 Commercial Substandard	Jun. 30, 2012 Commercial Substandard Impaired	Dec. 31, 2011 Commercial Substandard Impaired	Jun. 30, 2012 Commercial Loss	Dec. 31, 2011 Commercial Loss	Jun. 30, 2012 Consumer and other	Dec. 31, 2011 Consumer and other	Jun. 30, 2012 Consumer and other High Quality	Dec. 31, 2011 Consumer and other High Quality	Jun. 30, 2012 Consumer and other Good Quality	Dec. 31, 2011 Consumer and other Good Quality	Jun. 30, 2012 Consumer and other Satisfactory	Dec. 31, 2011 Consumer and other Satisfactory	Jun. 30, 2012 Consumer and other Merits Attention	Dec. 31, 2011 Consumer and other Merits Attention	Jun. 30, 2012 Consumer and other Special Mention	Dec. 31, 2011 Consumer and other Special Mention	Jun. 30, 2012 Consumer and other Substandard	Dec. 31, 2011 Consumer and other Substandard	Jun. 30, 2012 Consumer and other Substandard Impaired	Dec. 31, 2011 Consumer and other Substandard Impaired	Jun. 30, 2012 Consumer and other Loss	Dec. 31, 2011 Consumer and other Loss	Jun. 30, 2012 Minimum
Credit Quality Indicators
Risk review threshold																																																																																																																																																			$ 20,000
Loans	$ 1,371,240,000	$ 1,450,039,000	$ 335,107,000	$ 348,931,000	$ 122,000	$ 126,000	$ 28,000	$ 32,000	$ 103,801,000	$ 110,051,000	$ 179,792,000	$ 180,173,000	$ 26,683,000	$ 23,326,000	$ 5,731,000	$ 10,069,000	$ 18,950,000	$ 25,154,000	$ 0	$ 0	$ 216,290,000	$ 242,827,000	$ 0	$ 0	$ 46,000	$ 117,000	$ 56,119,000	$ 61,416,000	$ 122,776,000	$ 134,247,000	$ 26,274,000	$ 24,307,000	$ 2,765,000	$ 11,162,000	$ 8,310,000	$ 11,578,000	$ 0	$ 0	$ 174,474,000	$ 179,047,000	$ 383,000	$ 423,000	$ 1,458,000	$ 1,701,000	$ 95,167,000	$ 98,992,000	$ 57,731,000	$ 57,310,000	$ 9,220,000	$ 9,112,000	$ 2,855,000	$ 3,586,000	$ 7,660,000	$ 7,923,000	$ 0	$ 0	$ 36,700,000	$ 39,881,000	$ 0	$ 0	$ 0	$ 0	$ 8,029,000	$ 8,789,000	$ 26,687,000	$ 28,824,000	$ 648,000	$ 697,000	$ 617,000	$ 629,000	$ 719,000	$ 942,000	$ 0	$ 0	$ 196,547,000	$ 201,220,000	$ 122,000	$ 132,000	$ 7,620,000	$ 7,545,000	$ 120,738,000	$ 125,932,000	$ 58,934,000	$ 58,576,000	$ 4,342,000	$ 4,807,000	$ 1,935,000	$ 2,006,000	$ 2,856,000	$ 2,222,000	$ 0	$ 0	$ 189,840,000	$ 202,803,000	$ 0	$ 0	$ 497,000	$ 543,000	$ 28,993,000	$ 30,446,000	$ 90,318,000	$ 93,974,000	$ 32,521,000	$ 41,739,000	$ 14,842,000	$ 5,054,000	$ 22,669,000	$ 31,047,000	$ 0	$ 0	$ 167,840,000	$ 177,047,000	$ 2,554,000	$ 2,690,000	$ 5,437,000	$ 5,472,000	$ 46,132,000	$ 55,309,000	$ 82,962,000	$ 80,064,000	$ 19,517,000	$ 12,224,000	$ 1,890,000	$ 10,367,000	$ 9,348,000	$ 10,921,000	$ 0	$ 0	$ 54,442,000	$ 58,283,000	$ 2,090,000	$ 1,831,000	$ 1,366,000	$ 1,482,000	$ 25,403,000	$ 27,508,000	$ 24,083,000	$ 25,607,000	$ 816,000	$ 1,189,000	$ 68,000	$ 118,000	$ 616,000	$ 548,000	$ 0	$ 0