Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock	Paid-in Capital in Excess of par	Accumulated Other Comprehensive Income/(Loss)	Retained Earnings	Total
Balances at Dec. 31, 2013	$ 84	$ 44,741	$ 325	$ 167,455	$ 212,605
Balances (in shares) at Dec. 31, 2013	8,400
Increase (Decrease) in Shareholders' Equity
Net income				4,331	4,331
Unrealized gain from derivative instruments, net of tax expense of $46			(79)		(79)
Shares issued under stock compensation plans	1	211			212
Shares issued under stock compensation plans (in shares)	63
Cancellation of restricted stock in satisfaction of withholding tax	(1)	(269)			(270)
Cancellation of restricted stock in satisfaction of withholding tax (in shares)	(16)
Stock-based compensation, net of forfeitures		758			758
Balances at Mar. 31, 2014	84	45,441	246	171,786	217,557
Balances (in shares) at Mar. 31, 2014	8,447
Balances at Dec. 31, 2014	83	42,076		174,702	216,861
Balances (in shares) at Dec. 31, 2014	8,346
Increase (Decrease) in Shareholders' Equity
Net income				2,298	2,298
Shares repurchased		(724)			(724)
Shares repurchased (in shares)	(38)
Shares issued under stock compensation plans		85			85
Shares issued under stock compensation plans (in shares)	10
Cancellation of restricted stock in satisfaction of withholding tax		(514)			(514)
Cancellation of restricted stock in satisfaction of withholding tax (in shares)	(25)
Stock-based compensation, net of forfeitures		1,074			1,074
Tax benefit on disqualified disposition of shares		143			143
Balances at Mar. 31, 2015	$ 83	$ 42,140		$ 177,000	$ 219,223
Balances (in shares) at Mar. 31, 2015	8,293