Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock	Paid-in Capital in Excess of par	Accumulated Other Comprehensive Income	Retained Earnings	Preferred Stock	Total
Balances at Dec. 31, 2013	$ 84	$ 44,741	$ 325	$ 167,309		$ 212,459
Balances (in shares) at Dec. 31, 2013	8,400,000
Increase (Decrease) in Shareholders' Equity
Net income attributable to common shareholders				7,180		7,180
Net unrealized loss from currency translation adjustment, net of tax benefit			(325)			(325)
Shares repurchased	$ (2)	(5,350)				(5,352)
Shares repurchased (in shares)	(249,000)
Shares issued under stock compensation plans	$ 2	408				410
Shares issued under stock compensation plans (in shares)	272,000
Cancellation of restricted stock units in satisfaction of withholding tax	$ (1)	(1,543)				(1,544)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)	(77,000)
Stock-based compensation, net of forfeitures		3,509				3,509
Tax benefit on disqualified disposition of shares		311				311
Balances at Dec. 31, 2014	$ 83	42,076		174,489		216,648
Balances (in shares) at Dec. 31, 2014	8,346,000
Increase (Decrease) in Shareholders' Equity
Net income attributable to common shareholders				6,460		6,460
Net unrealized loss from currency translation adjustment, net of tax benefit			(521)			(521)
Shares repurchased	$ (9)	(16,491)				(16,500)
Shares repurchased (in shares)	(912,000)
Shares issued under stock compensation plans	$ 2	516				518
Shares issued under stock compensation plans (in shares)	205,000
Cancellation of restricted stock units in satisfaction of withholding tax	$ (1)	(1,557)				(1,558)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)	(91,000)
Stock-based compensation, net of forfeitures		4,150				4,150
Tax benefit on disqualified disposition of shares		26				26
Balances at Dec. 31, 2015	$ 75	28,720	(521)	180,949		$ 209,223
Balances (in shares) at Dec. 31, 2015	7,548,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)						0
Net income attributable to common shareholders				14,069		$ 14,069
Net unrealized loss from currency translation adjustment, net of tax benefit			(568)			(568)
Net unrealized gain from derivative instruments, net of tax expense			44			44
Shares repurchased	$ (12)	(28,946)				(28,958)
Shares repurchased (in shares)	(1,212,000)
Shares issued under stock compensation plans	$ 1	154				155
Shares issued under stock compensation plans (in shares)	127,000
Cancellation of restricted stock units in satisfaction of withholding tax		(1,369)				(1,369)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)	(61,000)
Stock-based compensation, net of forfeitures		3,717				3,717
Issuance of preferred stock					$ 19,752
Tax benefit on disqualified disposition of shares		236				236
Accretion of preferred stock issuance costs				(8)	8	(8)
Preferred stock dividends paid				(281)		(281)
Balances at Dec. 31, 2016	$ 64	$ 2,512	$ (1,045)	$ 194,729	$ 19,760	$ 196,260
Balances (in shares) at Dec. 31, 2016	6,402,000				1,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)					1,000	1,000,000