Note 8 - Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

(in thousands)	Littelfuse, Inc. Shareholders’ Equity			Non- controlling Interest			Total
Balance at December 30, 2017	$	927,419		$	137		$	927,556
Net income		78,354			—			78,354
Other comprehensive income (loss)		(16,221	)		—			(16,221	)
Stock-based compensation		15,883			—			15,883
Withheld shares on restricted share units for withholding taxes		(7,042	)		—			(7,042	)
Stock options exercised		17,654			—			17,654
Issuance of common stock (a)		472,301			—			472,301
Cash dividends paid ($0.37 per share)		(18,458	)		—			(18,458	)
Non-controlling interest		—			(7	)		(7	)
Balance at June 30, 2018	$	1,469,890		$	130		$	1,470,020

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

(in thousands)	Pension and postretirement liability and reclassification adjustments (a)			Unrealized gain/(loss) on investments			Foreign currency translation adjustment			Accumulated other comprehensive income (loss)
Balance at December 30, 2017	$	(10,836	)	$	9,795		$	(62,627	)	$	(63,668	)
Cumulative effect adjustment (b)		—			(9,795	)		—			(9,795	)
Activity in the period		763			—			(16,984	)		(16,221	)
Balance at June 30, 2018	$	(10,073	)	$	—		$	(79,611	)	$	(89,684	)