CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash provided by (used for) operating activities:
Net income	$ 6,531	$ 17,148
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization	23,202	18,994
Provision for doubtful accounts	167	123
Provision for inventory write-downs	2,189	2,398
Deferred income taxes	(953)	1,413
Tax benefit from exercise of stock options and vested restricted stock	0	2,230
Excess tax benefit from stock-based compensation	0	(2,292)
Shares issued for employee benefit plan	591	763
Employee and director stock-based compensation	9,476	7,638
Performance-based common stock warrants	1,122	3,219
Changes in operating assets and liabilities:
Restricted cash	4,623	0
Accounts receivable	(24,440)	(11,359)
Inventories	(21,217)	(4,470)
Prepaid expenses and other assets	(2,422)	(86)
Accounts payable and accrued expenses	1,488	7,699
Accrued income taxes	(1,517)	(4,737)
Net cash provided by (used for) operating activities	(1,160)	38,681
Cash used for investing activities:
Acquisition of property, plant, and equipment	(29,922)	(28,914)
Acquisition of net assets of Residential Control Systems, Inc.	(8,894)	0
Acquisition of intangible assets	(1,275)	(1,373)
Increase in restricted cash	0	(4,797)
Deposit received toward sale of Guangzhou factory	0	4,797
Deconsolidation of Encore Controls LLC	0	48
Net cash used for investing activities	(40,091)	(30,239)
Cash provided by (used for) financing activities:
Borrowings under line of credit	115,000	92,987
Repayments on line of credit	(50,987)	(107,987)
Proceeds from stock options exercised	1,107	4,813
Treasury stock purchased	(20,217)	(2,188)
Excess tax benefit from stock-based compensation	0	2,292
Net cash provided by (used for) financing activities	44,903	(10,083)
Effect of exchange rate changes on cash	(5,703)	(3,184)
Net increase (decrease) in cash and cash equivalents	(2,051)	(4,825)
Cash and cash equivalents at beginning of year	50,611	52,966
Cash and cash equivalents at end of period	48,560	48,141
Supplemental cash flow information:
Income taxes paid	5,770	6,034
Interest paid	$ 1,697	$ 926