Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Preferred Stock	Common Stock	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2015		$ 75	$ 28,720	$ 180,949	$ (521)	$ 209,223
Balances (in shares) at Dec. 31, 2015		7,548,000
Increase (Decrease) in Shareholders' Equity
Net income				14,069		14,069
Net unrealized gain (loss) from currency translation adjustment, net of tax benefit					(568)	(568)
Net unrealized gain (loss) 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
Accretion of preferred stock issuance costs	8			(8)		(8)
Preferred stock dividends paid				(281)		(281)
Tax benefit on disqualified disposition of shares			236			236
Balances at Dec. 31, 2016	$ 19,760	$ 64	2,512	194,729	(1,045)	196,260
Balances (in shares) at Dec. 31, 2016	1,000,000	6,402,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)	1,000,000
Net income				62,158		62,158
Net unrealized gain (loss) from currency translation adjustment, net of tax benefit					584	584
Net unrealized gain (loss) from derivative instruments, net of tax expense					687	687
Shares repurchased		$ (2)	(3,544)			(3,546)
Shares repurchased (in shares)		(155,312)
Shares issued under stock compensation plans		$ 2	175			177
Shares issued under stock compensation plans (in shares)		216,000
Cancellation of restricted stock units in satisfaction of withholding tax			(1,094)			(1,094)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)		(44,000)
Stock-based compensation, net of forfeitures			4,270			4,270
Issuance of preferred stock	$ 29,665
Accretion of preferred stock issuance costs	46			(46)		(46)
Preferred stock dividends paid				(1,813)		(1,813)
Other				1,273		1,273
Balances at Dec. 31, 2017	$ 49,471	$ 64	2,319	256,301	226	$ 258,910
Balances (in shares) at Dec. 31, 2017	2,500,000	6,419,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)	1,500,000					2,500,000
Net income				43,231		$ 43,231
Net unrealized gain (loss) from currency translation adjustment, net of tax benefit					(596)	(596)
Net unrealized gain (loss) from derivative instruments, net of tax expense					413	413
Shares repurchased		$ (5)	(6,683)	(9,517)		(16,205)
Shares repurchased (in shares)		(472,000)
Shares issued under stock compensation plans		$ 3	242			245
Shares issued under stock compensation plans (in shares)		272,000
Cancellation of restricted stock units in satisfaction of withholding tax			(1,288)			(1,288)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)		(43,000)
Stock-based compensation, net of forfeitures			$ 5,410			5,410
Accretion of preferred stock issuance costs	$ 83			(83)		(83)
Preferred stock dividends paid				(3,250)		(3,250)
Balances at Dec. 31, 2018	$ 49,554	$ 62		286,623	102	$ 286,787
Balances (in shares) at Dec. 31, 2018	2,500,000	6,176,000
Increase (Decrease) in Shareholders' Equity
Issuance of preferred stock (in shares)						2,500,000
Adoption of ASU 2018-02 | ASU 2018-02				$ (59)	$ 59