Regulatory Matters (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Company
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$ 973,346,000	$ 953,132,000
Total Capital, Required For Capital Adequacy Purposes	586,359,000	552,412,000
Required for Capital Adequacy with Capital Buffer	632,168,000
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	895,429,000	874,771,000
Tier I Capital, Required For Capital Adequacy Purposes	439,769,000	414,309,000
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	485,578,000
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	895,429,000	874,771,000
Tier I Capital, Required For Capital Adequacy Purposes	$ 321,554,000	$ 303,528,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	13.28%	13.80%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted assets), Minimum Required for Capital Adequacy with Capital Buffer	8.625%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	12.22%	12.67%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	6.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	6.625%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	11.14%	11.53%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Bank
Total capital (to risk-weighted assets), Amount
Total Capital, Actual	$ 967,163,000	$ 945,013,000
Total Capital, Required For Capital Adequacy Purposes	586,152,000	552,226,000
Required for Capital Adequacy with Capital Buffer	631,945,000
Required To Be Well Capitalized under Prompt Corrective Action Provisions	732,690,000	690,283,000
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	889,245,000	866,652,000
Tier I Capital, Required For Capital Adequacy Purposes	439,614,000	414,170,000
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	485,407,000
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	586,152,000	552,226,000
Tier I capital (to average assets), Amount
Tier I Capital, Actual (Leverage)	889,245,000	866,652,000
Tier I Capital, Required For Capital Adequacy Purposes	321,551,000	303,410,000
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	$ 401,939,000	$ 379,262,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Total Capital (to Risk Weighted Assets), Actual	13.20%	13.69%
Total Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes	8.00%	8.00%
Total Capital (to Risk Weighted assets), Minimum Required for Capital Adequacy with Capital Buffer	8.625%
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	12.14%	12.56%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	6.00%	6.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	6.625%
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	8.00%	8.00%
Tier I capital (to average assets), Ratio
Tier I Capital (to Average Assets), Actual (Leverage)	11.06%	11.43%
Tier I Capital (to Average Assets), Minimum For Capital Adequacy Purposes (Leverage)	4.00%	4.00%
Tier I Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Leverage)	5.00%	5.00%
Common Equity Tier 1 [Member] \| Company
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	$ 854,438,000	$ 833,868,000
Tier I Capital, Required For Capital Adequacy Purposes	329,827,000	$ 310,732,000
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	$ 375,636,000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	11.66%	12.08%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%	4.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	5.125%
Common Equity Tier 1 [Member] \| Bank
Tier I capital (to risk-weighted assets), Amount
Tier I Capital, Actual (Risk Based)	$ 889,245,000	$ 866,652,000
Tier I Capital, Required For Capital Adequacy Purposes	329,711,000	310,627,000.0000
Tier 1 Capital, Required for Capital Adequacy with Capital Buffer	375,504,000
Tier I Capital, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	$ 476,248,630.0000	$ 448,684,000.0000
Total capital and Tier I capital (to risk-weighted assets), Ratio
Tier I Capital (to Risk Weighted Assets), Actual (Risk Based)	12.14%	12.56%
Tier I Capital (to Risk Weighted Assets), Minimum For Capital Adequacy Purposes (Risk Based)	4.50%	4.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Required for Capital Adequacy with Capital Buffer	5.125%
Tier I Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions (Risk Based)	6.50%	6.50%

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The amount of total capital as defined in the regulations.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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