Condensed Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Treasury Stock	Additional paid in capital	Retained earnings	Accumulated other comprehensive income (loss)	Parent [Member]
Balance at Dec. 31, 2013		$ 0	$ 194	$ (1,743)	$ 200,258	$ 85,376	$ (4,380)	$ 279,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,848	0	0	0	0	5,848	0	5,848
Other comprehensive income	1,757	0	0	0	0	0	1,757	1,757
Cash dividends paid on common shares, $0.0525 per share		0	0	0	0	(1,043)	0	(1,043)
Issuance under equity compensation plans, net		0	1	0	(630)	0	0	(629)
Trust preferred securities conversion		0	3	0	4,999	0	0	5,002
Share-based compensation		0	0	0	735	0	0	735
Excess tax benefit related to equity compensation plans		0	0	0	74	0	0	74
Balance at Mar. 31, 2014		0	198	(1,743)	205,436	90,181	(2,623)	291,449
Balance at Dec. 31, 2014	316,241	0	199	(1,743)	207,731	108,373	1,681
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,346	0	0	0	0	9,346	0	9,346
Other comprehensive income	1,698	0	0	0	0	0	1,698	1,698
Cash dividends paid on common shares, $0.0525 per share		0	0	0	0	(1,051)	0	(1,051)
Issuance under equity compensation plans, net		0	1	0	(1,047)	0	0	(1,046)
Share-based compensation		0	0	0	768	0	0	768
Excess tax benefit related to equity compensation plans		0	0	0	153	0	0	153
Balance at Mar. 31, 2015	$ 326,109	$ 0	$ 200	$ (1,743)	$ 207,605	$ 116,668	$ 3,379	$ 326,109