Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2017

Regulatory Matters

Summary of bank's actual capital amounts and ratios

					Minimum Amount
					Required for				Minimum Amount
					Adequately				To Be Well
	Actual				Capitalized(1)				Capitalized(1)
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
December 31, 2017
Total capital(1) (to risk-weighted assets)
Company	$	355,722	13.7	%	$	207,657	8.0	%	$	—	N/A
Bank		406,638	15.7	%		207,567	8.0	%		259,459	10.0	%
Tier 1 capital(1) (to risk-weighted assets)
Company		347,411	13.4	%		155,743	6.0	%		—	N/A
Bank		398,327	15.4	%		155,675	6.0	%		207,567	8.0	%
Common Equity Tier 1 capital(1) (to risk-weighted assets)
Company		305,830	11.8	%		116,807	4.5	%		—	N/A
Bank		398,327	15.4	%		116,756	4.5	%		168,648	6.5	%
Tier 1 capital(1) (to average assets)
Company		347,411	10.9	%		127,318	4.0	%		—	N/A
Bank		398,327	12.5	%		127,593	4.0	%		159,491	5.0	%

(1) As defined by regulatory agencies.

					Minimum				Minimum
					Amount Required				Amount To Be
					for Adequately				Well
	Actual				Capitalized(1)				Capitalized(1)
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in thousands)
December 31, 2016
Total capital(1) (to risk-weighted assets)
Company	$	201,496	10.6	%	$	151,459	8.0	%	$	—	N/A
Bank		255,539	13.5	%		151,332	8.0	%		189,165	10.0	%
Tier I capital(1) (to risk-weighted assets)
Company		195,188	10.3	%		113,594	6.0	%		—	N/A
Bank		249,231	13.2	%		113,499	6.0	%		151,332	8.0	%
Common Equity Tier I capital(1) (to risk-weighted assets)
Company		153,607	8.1	%		85,196	4.5	%		—	N/A
Bank		249,231	13.2	%		85,124	4.5	%		122,957	6.5	%
Tier I capital(1) (to average assets)
Company		195,188	6.6	%		118,082	4.0	%		—	N/A
Bank		249,231	8.4	%		118,258	4.0	%		147,822	5.0	%

(1) As defined by regulatory agencies.

Beginning January 1, 2015, the Basel III Capital Rules applied to the Bank. The following table lists the capital categories and ratios determined by the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporation.

					Common Equity
	Total Risk-based		Tier 1 Risk-based		Tier 1 Risk-based		Tier 1
Capital Category	Capital ratio		Capital ratio		Capital ratio		Leverage ratio
Well capitalized	10	%	8	%	6.5	%	5	%
Adequately capitalized	8		6		4.5		4
Undercapitalized	<8		<6		<4.5		<4
Significantly undercapitalized	<6		<4		<3		<3
Critically undercapitalized	Tangible Equity/Total Assets </= 2%