Condensed Consolidated Statements of Cash Flows $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 54,706	$ 127,701
Income from discontinued operations, net of income taxes	8,690	(226)
Income from continuing operations, net of income taxes	46,016	127,927
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,301	9,488
Stock-based compensation expense	5,053	7,461
Provision for deferred income taxes	2,825
Gain on sale of central inverter service business	(14,804)
Net loss on disposal of assets	104	167
Changes in operating assets and liabilities, net of assets acquired:
Accounts and other receivable, net	(23,292)	(6,739)
Inventories	(7,217)	(22,132)
Other assets	13,695	717
Accounts payable	23,676	(8,553)
Other liabilities and accrued expenses	(17,779)	49
Income taxes	(14,720)	10,098
Net cash provided by operating activities from continuing operations	28,858	118,483
Net cash provided by (used in) operating activities from discontinued operations	317	(4,550)
Net cash provided by operating activities	29,175	113,933
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities		(93)
Proceeds from sale of marketable securities	1,742	6
Acquisitions, net of cash acquired	(365,798)	(93,801)
Issuance of notes receivable	(2,800)
Purchases of property and equipment	(15,681)	(16,586)
Net cash used in investing activities from continuing operations	(382,537)	(110,474)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from long-term borrowings	347,486
Payments on long-term borrowings	(4,375)
Purchase and retirement of common stock		(69,021)
Net payments related to stock-based award activities	(714)	(2,636)
Net cash provided by (used in) financing activities from continuing operations	342,397	(71,657)
EFFECT OF CURRENCY TRANSLATION ON CASH	(3,185)	(722)
DECREASE IN CASH AND CASH EQUIVALENTS	(14,150)	(68,920)
CASH AND CASH EQUIVALENTS, beginning of period	354,552	415,037
CASH AND CASH EQUIVALENTS, end of period	340,402	346,117
Less cash and cash equivalents from discontinued operations		7,444
CASH AND CASH EQUIVALENTS FROM CONTINUING OPERATIONS, end of period	340,402	338,673
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	1,049	171
Cash paid for income taxes	15,372	14,180
Cash received for refunds of income taxes	$ 1,537	$ 734