Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities
Net income	$ 5,399	$ 30,863	$ 13,302
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization expense	16,927	15,995	14,198
Stock-based compensation expense	3,579	9,633	4,534
Impairment of intangible asset	2,700	0	0
Amortization of debt issuance costs and debt discount	1,922	5,648	591
Loss on debt modification and extinguishment		703	476
Loss on sale of a discontinued operation		1,039
Excess tax benefits from stock-based compensation	(611)
Deferred income taxes	(1,829)	10,914	(1,433)
Other, net	448	(45)	(124)
Changes in operating assets and liabilities:
Accounts receivable	19,847	(9,556)	(7,003)
Inventories	5,793	(4,416)	(5,763)
Prepaid expenses and other assets	(527)	(714)	(8,473)
Income taxes	5,429	(4,975)	3,061
Accounts payable	(6,394)	1,663	1,466
Accrued expenses	3,841	915	12,665
Deferred revenue and customer deposits	3,037	699	(772)
Other liabilities	397	(14,444)	(98)
Cash provided by operating activities	59,958	43,922	26,627
Investing activities
Acquisitions of plant, equipment and leasehold improvements	(14,294)	(18,670)	(16,956)
Proceeds from sale of a discontinued operation		5,000
Acquisition of EFT Source, Inc, net of cash			(54,859)
Cash used in investing activities	(14,294)	(13,670)	(71,815)
Financing activities
Payments of Sellers Note	(9,000)
Dividends paid on common stock	(7,519)
Common stock repurchased	(6,008)
Proceeds from sale of Company stock, net of issuance costs		135,304
Proceeds from First Lien Term Loan		435,000
Payment on First Lien Term Loan		(122,500)
Proceeds from long-term debt			60,000
Payment on long-term debt		(170,929)	(11,045)
Loan issuance costs		(17,773)	(440)
Dividend distribution on Series A Preferred Stock		(230,315)
Redemption of preferred and common stock		(58,296)
Proceeds from employee note receivable		108	19
Excess tax benefits from stock-based compensation	611
Cash used in financing activities	(21,916)	(29,401)	48,534
Effect of exchange rates on cash	(399)	(186)	(107)
Net increase in cash and cash equivalents:	23,349	665	3,239
Cash and cash equivalents, beginning of period	13,606	12,941	9,702
Cash and cash equivalents, end of period	36,955	13,606	12,941
Supplemental disclosures of cash flow information
Interest	15,071	11,986	6,793
Income taxes paid, net of refunds	$ (468)	$ 10,136	$ 3,219