Regulatory Capital Requirements and Other Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Tier 1 Capital (to adjusted tangible assets)
Actual, Amount (in dollars)	$ 366,658	$ 254,280
Actual, Ratio (as a percent)	9.78%	9.52%
Minimum Required for Capital Adequacy Purposes Amount (in dollars)	$ 150,027	$ 106,886
Minimum Required for Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%
Common Equity Tier 1 Risk-Based Capital (to adjusted tangible assets)
Actual, Amount (in dollars)	$ 356,658	$ 245,224
Actual, Ratio (as a percent)	10.17%	9.91%
Minimum Required for Capital Adequacy Purposes (in dollars)	$ 157,878	$ 111,336
Minimum Required for Capital Adequacy Purposes (as a percent)	4.50%	4.50%
Tier 1 Risk-Based Capital (to risk-weighted assets)
Actual, Amount (in dollars)	$ 366,658	$ 254,280
Actual, Ratio (as a percent)	10.45%	10.28%
Minimum Required for Capital Adequacy Purposes Amount (in dollars)	$ 210,503	$ 148,448
Minimum Required for Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%
Total Capital (to risk-weighted assets)
Actual, Amount (in dollars)	$ 448,150	$ 332,200
Actual, Ratio (as a percent)	12.77%	13.43%
Minimum Required for Capital Adequacy Purposes Amount (in dollars)	$ 280,671	$ 197,931
Minimum Required for Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%
Bank
Tier 1 Capital (to adjusted tangible assets)
Actual, Amount (in dollars)	$ 410,524	$ 304,442
Actual, Ratio (as a percent)	10.94%	11.41%
Minimum Required for Capital Adequacy Purposes Amount (in dollars)	$ 150,107	$ 106,684
Minimum Required for Capital Adequacy Purposes Ratio (as a percent)	4.00%	4.00%
Required to be Well Capitalized Under Prompt Corrective Action Regulations, Amount (in dollars)	$ 187,634	$ 133,354
Required to be Well Capitalized Under Prompt Corrective Action Regulations, Ratio (as a percent)	5.00%	5.00%
Common Equity Tier 1 Risk-Based Capital (to adjusted tangible assets)
Actual, Amount (in dollars)	$ 410,524	$ 304,442
Actual, Ratio (as a percent)	11.70%	12.35%
Minimum Required for Capital Adequacy Purposes (in dollars)	$ 157,840	$ 110,954
Minimum Required for Capital Adequacy Purposes (as a percent)	4.50%	4.50%
Required to be Well Capitalized Under Prompt Corrective Action Regulations (in dollars)	$ 227,991	$ 160,267
Required to be Well Capitalized Under Prompt Corrective Action Regulations (as a percent)	6.50%	6.50%
Tier 1 Risk-Based Capital (to risk-weighted assets)
Actual, Amount (in dollars)	$ 410,524	$ 304,442
Actual, Ratio (as a percent)	11.70%	12.35%
Minimum Required for Capital Adequacy Purposes Amount (in dollars)	$ 210,453	$ 147,938
Minimum Required for Capital Adequacy Purposes Ratio (as a percent)	6.00%	6.00%
Required to be Well Capitalized Under Prompt Corrective Action Regulations, Amount (in dollars)	$ 280,605	$ 197,251
Required to be Well Capitalized Under Prompt Corrective Action Regulations, Ratio (as a percent)	8.00%	8.00%
Total Capital (to risk-weighted assets)
Actual, Amount (in dollars)	$ 432,943	$ 322,361
Actual, Ratio (as a percent)	12.34%	13.07%
Minimum Required for Capital Adequacy Purposes Amount (in dollars)	$ 280,605	$ 197,251
Minimum Required for Capital Adequacy Purposes Ratio (as a percent)	8.00%	8.00%
Required to be Well Capitalized Under Prompt Corrective Action Regulations, Amount (in dollars)	$ 350,756	$ 246,564
Required to be Well Capitalized Under Prompt Corrective Action Regulations, Ratio (as a percent)	10.00%	10.00%