| Accounting Policies [Abstract] | Period [Axis] |
|---|
2016-01-03 - 2016-12-31 |
|---|
Accounting Policies [Abstract] | |
Schedule of Cash, Cash Equivalents and Investments | | | | | | | | | | | | | | Year-End 2015 (In thousands) | Cash and cash equivalents | | Short-term investments | | Long-term investments | Held-to-maturity securities | | | | | | Certificates of deposit | $ | — |
| | $ | 252 |
| | $ | — |
| Available-for-sale securities | | | | | | Debt securities | — |
| | 4,000 |
| | 8,067 |
| Cash and money market accounts | 28,548 |
| | — |
| | — |
| Total | $ | 28,548 |
| | $ | 4,252 |
| | $ | 8,067 |
|
At December 31, 2016 and January 2, 2016, cash, cash equivalents and investments consisted of the following:
| | | | | | | | | | | | | Year-End 2016 (In thousands) | Cash and cash equivalents | | Short-term investments | | Long-term investments | Available-for-sale securities | | | | | | Debt securities | — |
| |
| $2,252 |
| |
| $10,033 |
| Cash and money market accounts |
| $36,312 |
| | — |
| | — |
| Total |
| $36,312 |
| |
| $2,252 |
| |
| $10,033 |
|
|
Allowance for Doubtful Accounts | | | | | | | | | | | | | | | | | | | Allowance for doubtful accounts | Balance at beginning of period | | Charged to costs and expenses | | Amounts written off, net of recoveries and other adjustments | | Divestitures | | Balance at end of period | Year ended December 31, 2016 |
| $4,287 |
| | (357 | ) | | 1,598 |
| | 192 |
| |
| $2,140 |
| Year ended January 2, 2016 |
| $5,096 |
| | 1,394 |
| | 2,203 |
| | — |
| |
| $4,287 |
| Year ended January 3, 2015 |
| $6,208 |
| | 343 |
| | 1,455 |
| | — |
| |
| $5,096 |
|
|
Schedule of Product Warranties | Activity associated with warranty obligations was as follows:
| | | | | | | | | | | | | (In thousands) | 2016 |
| | 2015 |
| | 2014 |
| Balance at the beginning of the period |
| $16,227 |
| |
| $16,719 |
| |
| $13,840 |
| Accrual assumed from acquisition | — |
| | — |
| | 1,100 |
| Accrual settled from divestiture | (538 | ) | | — |
| | — |
| Accruals for warranties issued during the period | 20,055 |
| | 19,995 |
| | 18,951 |
| Accrual (Recovery) related to pre-existing warranties | 604 |
| | (334 | ) | | 172 |
| Settlements made during the period | (21,098 | ) | | (20,153 | ) | | (17,344 | ) | Balance at the end of the period |
| $15,250 |
| |
| $16,227 |
| |
| $16,719 |
|
|
Schedule of Earnings Per Share, Basic and Diluted | The following table reconciles the numerators and denominators used in the calculation of basic and diluted earnings per share (EPS):
| | | | | | | | | | | | | (In thousands, except per share data) | 2016 |
| | 2015 |
| | 2014 |
| Numerators: | | | | | |
| Numerators for both basic and diluted EPS net income attributable to parent company |
| $85,577 |
| |
| $105,436 |
| | $ | 61,471 |
| Denominators: | | | | | | Denominator for basic EPS weighted- average common shares outstanding | 44,414 |
| | 44,285 |
| | 44,760 |
| Potentially dilutive shares from stock option plans | 1,088 |
| | 1,156 |
| | 819 |
| Denominator for diluted EPS | 45,502 |
| | 45,441 |
| | 45,579 |
| Earnings per share – basic |
| $1.93 |
| |
| $2.38 |
| |
| $1.37 |
| Earnings per share – diluted |
| $1.88 |
| |
| $2.32 |
| |
| $1.35 |
|
|