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Note 8 - Shareholders' Equity | 3 Months Ended
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Mar. 31, 2018
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | 8 . Shareholders’ Equity The following table sets forth the changes in shareholders’ equity for the three months ended March 31, 2018:
(in thousands ) |  | Littelfuse, Inc. Shareholders’ Equity |  |  | Non- controlling Interest |  |  | Total |
Balance at December 30, 2017 |  | $ | 927,419 |  |  | $ | 137 |  |  | $ | 927,556 |
Net income |  |  | 36,029 |  |  |  | — |  |  |  | 36,029 |
Other comprehensive income |  |  | (279 | ) |  |  | — |  |  |  | (279 | )
Stock-based compensation |  |  | 8,714 |  |  |  | — |  |  |  | 8,714 |
Withheld shares on restricted share units for withholding taxes |  |  | (2,758 | ) |  |  | — |  |  |  | (2,758 | )
Stock options exercised |  |  | 9,609 |  |  |  | — |  |  |  | 9,609 |
Issuance of common stock (a) |  |  | 472,301 |  |  |  | — |  |  |  | 472,301 |
Cash dividends paid ($0.37 per share) |  |  | (9,198 | ) |  |  | — |  |  |  | (9,198 | )
Non-controlling interest |  |  | — |  |  |  | — |  |  |  | — |
Balance at March 31, 2018 |  | $ | 1,441,837 |  |  | $ | 137 |  |  | $ | 1,441,974 |
(a) The issuance of common stock ( 2,092,491 shares) during the three months ended March 31, 2018 relates to the acquisition of IXYS. See Note 2, Acquisitions for further discussion. The following table sets forth the changes in the components of Accumulated Other Comprehensive Income (Loss) by component for the three months ended March 31, 2018:
(in thousands ) |  | Pension and postretirement liability and reclassification adjustments (a) |  |  | Unrealized g ain /(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 |  |  | (3 | ) |  |  | — |  |  |  | (276 | ) |  |  | (279 | )
Balance at March 31, 2018 |  | $ | (10,839 | ) |  | $ | — |  |  | $ | (62,903 | ) |  | $ | (73,742 | )
(a) The balances at March 31, 2018 and December 30, 2017 are net of taxes of $0.2 million and $1.4 million, respectively. (b) The Company adopted ASU 2016 - 01 on December 31, 2018 on a modified retrospective basis, recognizing the cumulative effect as a $9.8 million increase to retained earnings. See Note 1, Summary of Significant Accounting Policies and Other Information , for further discussion.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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