Loans and Allowance for Loan Losses - Credit Quality Indicators (Details) (USD $)																																																																																																																																																																																							6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Commercial	Dec. 31, 2013 Commercial	Jun. 30, 2014 Commercial High Quality	Dec. 31, 2013 Commercial High Quality	Jun. 30, 2014 Commercial Good Quality	Dec. 31, 2013 Commercial Good Quality	Jun. 30, 2014 Commercial Satisfactory	Dec. 31, 2013 Commercial Satisfactory	Jun. 30, 2014 Commercial Merits Attention	Dec. 31, 2013 Commercial Merits Attention	Jun. 30, 2014 Commercial Special Mention	Dec. 31, 2013 Commercial Special Mention	Jun. 30, 2014 Commercial Substandard	Dec. 31, 2013 Commercial Substandard	Jun. 30, 2014 Commercial Substandard Impaired	Dec. 31, 2013 Commercial Substandard Impaired	Jun. 30, 2014 Commercial Doubtful	Dec. 31, 2013 Commercial Doubtful	Jun. 30, 2014 Commercial Loss	Dec. 31, 2013 Commercial Loss	Jun. 30, 2014 Consumer and other	Dec. 31, 2013 Consumer and other	Jun. 30, 2014 Consumer and other High Quality	Dec. 31, 2013 Consumer and other High Quality	Jun. 30, 2014 Consumer and other Good Quality	Dec. 31, 2013 Consumer and other Good Quality	Jun. 30, 2014 Consumer and other Satisfactory	Dec. 31, 2013 Consumer and other Satisfactory	Jun. 30, 2014 Consumer and other Merits Attention	Dec. 31, 2013 Consumer and other Merits Attention	Jun. 30, 2014 Consumer and other Special Mention	Dec. 31, 2013 Consumer and other Special Mention	Jun. 30, 2014 Consumer and other Substandard	Dec. 31, 2013 Consumer and other Substandard	Jun. 30, 2014 Consumer and other Substandard Impaired	Dec. 31, 2013 Consumer and other Substandard Impaired	Jun. 30, 2014 Consumer and other Doubtful	Dec. 31, 2013 Consumer and other Doubtful	Jun. 30, 2014 Consumer and other Loss	Dec. 31, 2013 Consumer and other Loss	Jun. 30, 2014 Loans Receivable [Member]	Dec. 31, 2013 Loans Receivable [Member]	Jun. 30, 2014 Loans Receivable [Member] High Quality	Dec. 31, 2013 Loans Receivable [Member] High Quality	Jun. 30, 2014 Loans Receivable [Member] Good Quality	Dec. 31, 2013 Loans Receivable [Member] Good Quality	Jun. 30, 2014 Loans Receivable [Member] Satisfactory	Dec. 31, 2013 Loans Receivable [Member] Satisfactory	Jun. 30, 2014 Loans Receivable [Member] Merits Attention	Dec. 31, 2013 Loans Receivable [Member] Merits Attention	Jun. 30, 2014 Loans Receivable [Member] Special Mention	Dec. 31, 2013 Loans Receivable [Member] Special Mention	Jun. 30, 2014 Loans Receivable [Member] Substandard	Dec. 31, 2013 Loans Receivable [Member] Substandard	Jun. 30, 2014 Loans Receivable [Member] Substandard Impaired	Dec. 31, 2013 Loans Receivable [Member] Substandard Impaired	Jun. 30, 2014 Loans Receivable [Member] Doubtful	Dec. 31, 2013 Loans Receivable [Member] Doubtful	Jun. 30, 2014 Loans Receivable [Member] Loss	Dec. 31, 2013 Loans Receivable [Member] Loss	Jun. 30, 2014 Owner Occupied	Dec. 31, 2013 Owner Occupied	Jun. 30, 2014 Owner Occupied High Quality	Dec. 31, 2013 Owner Occupied High Quality	Jun. 30, 2014 Owner Occupied Good Quality	Dec. 31, 2013 Owner Occupied Good Quality	Jun. 30, 2014 Owner Occupied Satisfactory	Dec. 31, 2013 Owner Occupied Satisfactory	Jun. 30, 2014 Owner Occupied Merits Attention	Dec. 31, 2013 Owner Occupied Merits Attention	Jun. 30, 2014 Owner Occupied Special Mention	Dec. 31, 2013 Owner Occupied Special Mention	Jun. 30, 2014 Owner Occupied Substandard	Dec. 31, 2013 Owner Occupied Substandard	Jun. 30, 2014 Owner Occupied Substandard Impaired	Dec. 31, 2013 Owner Occupied Substandard Impaired	Jun. 30, 2014 Owner Occupied Doubtful	Dec. 31, 2013 Owner Occupied Doubtful	Jun. 30, 2014 Owner Occupied Loss	Dec. 31, 2013 Owner Occupied Loss	Jun. 30, 2014 Non-owner Occupied	Dec. 31, 2013 Non-owner Occupied	Jun. 30, 2014 Non-owner Occupied High Quality	Dec. 31, 2013 Non-owner Occupied High Quality	Jun. 30, 2014 Non-owner Occupied Good Quality	Dec. 31, 2013 Non-owner Occupied Good Quality	Jun. 30, 2014 Non-owner Occupied Satisfactory	Dec. 31, 2013 Non-owner Occupied Satisfactory	Jun. 30, 2014 Non-owner Occupied Merits Attention	Dec. 31, 2013 Non-owner Occupied Merits Attention	Jun. 30, 2014 Non-owner Occupied Special Mention	Dec. 31, 2013 Non-owner Occupied Special Mention	Jun. 30, 2014 Non-owner Occupied Substandard	Dec. 31, 2013 Non-owner Occupied Substandard	Jun. 30, 2014 Non-owner Occupied Substandard Impaired	Dec. 31, 2013 Non-owner Occupied Substandard Impaired	Jun. 30, 2014 Non-owner Occupied Doubtful	Dec. 31, 2013 Non-owner Occupied Doubtful	Jun. 30, 2014 Non-owner Occupied Loss	Dec. 31, 2013 Non-owner Occupied Loss	Jun. 30, 2014 One to Four Family	Dec. 31, 2013 One to Four Family	Jun. 30, 2014 One to Four Family High Quality	Dec. 31, 2013 One to Four Family High Quality	Jun. 30, 2014 One to Four Family Good Quality	Dec. 31, 2013 One to Four Family Good Quality	Jun. 30, 2014 One to Four Family Satisfactory	Dec. 31, 2013 One to Four Family Satisfactory	Jun. 30, 2014 One to Four Family Merits Attention	Dec. 31, 2013 One to Four Family Merits Attention	Jun. 30, 2014 One to Four Family Special Mention	Dec. 31, 2013 One to Four Family Special Mention	Jun. 30, 2014 One to Four Family Substandard	Dec. 31, 2013 One to Four Family Substandard	Jun. 30, 2014 One to Four Family Substandard Impaired	Dec. 31, 2013 One to Four Family Substandard Impaired	Jun. 30, 2014 One to Four Family Doubtful	Dec. 31, 2013 One to Four Family Doubtful	Jun. 30, 2014 One to Four Family Loss	Dec. 31, 2013 One to Four Family Loss	Jun. 30, 2014 Multifamily	Dec. 31, 2013 Multifamily	Jun. 30, 2014 Multifamily High Quality	Dec. 31, 2013 Multifamily High Quality	Jun. 30, 2014 Multifamily Good Quality	Dec. 31, 2013 Multifamily Good Quality	Jun. 30, 2014 Multifamily Satisfactory	Dec. 31, 2013 Multifamily Satisfactory	Jun. 30, 2014 Multifamily Merits Attention	Dec. 31, 2013 Multifamily Merits Attention	Jun. 30, 2014 Multifamily Special Mention	Dec. 31, 2013 Multifamily Special Mention	Jun. 30, 2014 Multifamily Substandard	Dec. 31, 2013 Multifamily Substandard	Jun. 30, 2014 Multifamily Substandard Impaired	Dec. 31, 2013 Multifamily Substandard Impaired	Jun. 30, 2014 Multifamily Doubtful	Dec. 31, 2013 Multifamily Doubtful	Jun. 30, 2014 Multifamily Loss	Dec. 31, 2013 Multifamily Loss	Jun. 30, 2014 Home Equity Lines of Credit	Dec. 31, 2013 Home Equity Lines of Credit	Jun. 30, 2014 Home Equity Lines of Credit High Quality	Dec. 31, 2013 Home Equity Lines of Credit High Quality	Jun. 30, 2014 Home Equity Lines of Credit Good Quality	Dec. 31, 2013 Home Equity Lines of Credit Good Quality	Jun. 30, 2014 Home Equity Lines of Credit Satisfactory	Dec. 31, 2013 Home Equity Lines of Credit Satisfactory	Jun. 30, 2014 Home Equity Lines of Credit Merits Attention	Dec. 31, 2013 Home Equity Lines of Credit Merits Attention	Jun. 30, 2014 Home Equity Lines of Credit Special Mention	Dec. 31, 2013 Home Equity Lines of Credit Special Mention	Jun. 30, 2014 Home Equity Lines of Credit Substandard	Dec. 31, 2013 Home Equity Lines of Credit Substandard	Jun. 30, 2014 Home Equity Lines of Credit Substandard Impaired	Dec. 31, 2013 Home Equity Lines of Credit Substandard Impaired	Jun. 30, 2014 Home Equity Lines of Credit Doubtful	Dec. 31, 2013 Home Equity Lines of Credit Doubtful	Jun. 30, 2014 Home Equity Lines of Credit Loss	Dec. 31, 2013 Home Equity Lines of Credit Loss	Jun. 30, 2014 Construction Loans	Dec. 31, 2013 Construction Loans	Jun. 30, 2014 Construction Loans High Quality	Dec. 31, 2013 Construction Loans High Quality	Jun. 30, 2014 Construction Loans Good Quality	Dec. 31, 2013 Construction Loans Good Quality	Jun. 30, 2014 Construction Loans Satisfactory	Dec. 31, 2013 Construction Loans Satisfactory	Jun. 30, 2014 Construction Loans Merits Attention	Dec. 31, 2013 Construction Loans Merits Attention	Jun. 30, 2014 Construction Loans Special Mention	Dec. 31, 2013 Construction Loans Special Mention	Jun. 30, 2014 Construction Loans Substandard	Dec. 31, 2013 Construction Loans Substandard	Jun. 30, 2014 Construction Loans Substandard Impaired	Dec. 31, 2013 Construction Loans Substandard Impaired	Jun. 30, 2014 Construction Loans Doubtful	Dec. 31, 2013 Construction Loans Doubtful	Jun. 30, 2014 Construction Loans Loss	Dec. 31, 2013 Construction Loans Loss	Jun. 30, 2014 Minimum
Credit Quality Indicators
Risk review threshold																																																																																																																																																																																							$ 20,000
Loans	$ 1,418,744,000	$ 1,357,767,000	$ 184,438,000	$ 185,443,000	$ 2,002,000	$ 2,640,000	$ 4,748,000	$ 5,084,000	$ 56,526,000	$ 63,674,000	$ 107,531,000	$ 94,313,000	$ 5,168,000	$ 7,874,000	$ 5,676,000	$ 9,553,000	$ 2,787,000	$ 2,305,000	$ 0	$ 0	$ 0	$ 0	$ 45,975,000	$ 51,667,000	$ 1,785,000	$ 2,162,000	$ 1,360,000	$ 1,160,000	$ 22,178,000	$ 21,221,000	$ 19,590,000	$ 26,126,000	$ 783,000	$ 676,000	$ 2,000	$ 32,000	$ 277,000	$ 290,000	$ 0	$ 0	$ 0	$ 0	$ 1,418,744,000	$ 1,357,767,000	$ 4,020,000	$ 5,053,000	$ 16,775,000	$ 16,753,000	$ 500,496,000	$ 505,919,000	$ 800,880,000	$ 725,128,000	$ 59,447,000	$ 61,593,000	$ 16,015,000	$ 22,830,000	$ 21,111,000	$ 20,491,000	$ 0	$ 0	$ 0	$ 0	$ 417,340,000	$ 382,766,000	$ 0	$ 0	$ 750,000	$ 0	$ 121,367,000	$ 125,560,000	$ 258,125,000	$ 226,320,000	$ 24,904,000	$ 20,284,000	$ 3,807,000	$ 4,244,000	$ 8,387,000	$ 6,358,000	$ 0	$ 0	$ 0	$ 0	$ 203,250,000	$ 196,926,000	$ 0	$ 0	$ 1,565,000	$ 1,587,000	$ 49,414,000	$ 47,453,000	$ 142,141,000	$ 133,072,000	$ 7,214,000	$ 7,392,000	$ 1,144,000	$ 2,624,000	$ 1,772,000	$ 4,798,000	$ 0	$ 0	$ 0	$ 0	$ 178,288,000	$ 174,072,000	$ 88,000	$ 90,000	$ 810,000	$ 982,000	$ 101,975,000	$ 99,578,000	$ 63,600,000	$ 62,242,000	$ 4,394,000	$ 5,307,000	$ 2,756,000	$ 3,005,000	$ 4,665,000	$ 2,868,000	$ 0	$ 0	$ 0	$ 0	$ 64,805,000	$ 41,713,000	$ 0	$ 0	$ 946,000	$ 957,000	$ 7,854,000	$ 7,691,000	$ 55,163,000	$ 31,686,000	$ 280,000	$ 551,000	$ 556,000	$ 572,000	$ 6,000	$ 256,000	$ 0	$ 0	$ 0	$ 0	$ 197,095,000	$ 194,145,000	$ 145,000	$ 161,000	$ 6,256,000	$ 6,627,000	$ 120,062,000	$ 118,339,000	$ 62,853,000	$ 61,026,000	$ 5,473,000	$ 5,075,000	$ 1,294,000	$ 1,632,000	$ 1,012,000	$ 1,285,000	$ 0	$ 0	$ 0	$ 0	$ 127,553,000	$ 131,035,000	$ 0	$ 0	$ 340,000	$ 356,000	$ 21,120,000	$ 22,403,000	$ 91,877,000	$ 90,343,000	$ 11,231,000	$ 14,434,000	$ 780,000	$ 1,168,000	$ 2,205,000	$ 2,331,000	$ 0	$ 0	$ 0	$ 0