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, 2015	$ 75	$ 28,720	$ (521)	$ 180,949		$ 209,223
Balances (in shares) at Dec. 31, 2015	7,548,000
Increase (Decrease) in Shareholders' Equity
Net income attributable to common shareholders				4,011		4,011
Net unrealized loss from currency translation adjustment, net of tax benefit			(288)			(288)
Shares repurchased	$ (2)	(4,451)				(4,453)
Shares repurchased (in shares)	(200,000)
Shares issued under stock compensation plans	$ 1	81				82
Shares issued under stock compensation plans (in shares)	98,000
Cancellation of restricted stock units in satisfaction of withholding tax		(424)				(424)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)	(22,000)
Stock-based compensation, net of forfeitures		944				944
Tax benefit on disqualified disposition of shares		55				55
Balances at Mar. 31, 2016	$ 74	24,925	(809)	184,960		$ 209,150
Balances (in shares) at Mar. 31, 2016	7,424,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)						1,000,000
Cumulative-effect adjustment				1,273		$ 1,273
Balance, adjusted	$ 64	2,512	(1,045)	196,002	$ 19,760	197,533
Balances (Scenario, Previously Reported) at Dec. 31, 2016	$ 64	2,512	(1,045)	194,729	$ 19,760	196,260
Balances at Dec. 31, 2016						196,260
Balances (in shares) (Scenario, Previously Reported) at Dec. 31, 2016	6,402,000				1,000
Balances (in shares) at Dec. 31, 2016	6,402,000				1,000
Increase (Decrease) in Shareholders' Equity
Net income attributable to common shareholders				8,167		8,167
Net unrealized loss from currency translation adjustment, net of tax benefit			65			65
Net unrealized gain from derivative instruments, net of tax expense			219			219
Shares repurchased	$ (1)	(883)				(884)
Shares repurchased (in shares)	(40,000)
Shares issued under stock compensation plans	$ 2	91				93
Shares issued under stock compensation plans (in shares)	175,000
Cancellation of restricted stock units in satisfaction of withholding tax		(270)				(270)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)	(11,000)
Stock-based compensation, net of forfeitures		874				874
Accretion of preferred stock issuance costs				(7)	$ 7	(7)
Preferred stock dividends paid				(321)		(321)
Balances at Mar. 31, 2017	$ 65	$ 2,324	$ (761)	$ 203,841	$ 19,767	$ 205,469
Balances (in shares) at Mar. 31, 2017	6,526,000				1,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)						1,000,000