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SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2019
SIGNIFICANT ACCOUNTING POLICIES |
Schedule of amortized cost basis, fair value and net unrealized loss of the available-for-sale securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, | ​ | 2019 | ​ | 2018
​ | ​ | Amortized | ​ | ​ | ​ | ​ | Net | ​ | Amortized | ​ | ​ | ​ | ​ | Net
​ | ​ | Cost | ​ | Fair | ​ | Unrealized | ​ | Cost | ​ | Fair | ​ | Unrealized
Type of Securities |  | Basis |  | Value |  | ​ | Loss |  | Basis |  | Value |  | ​ | Loss
(in thousands) |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Municipal Obligations | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 1,490 | ​ | $ | 1,490 | ​ | $ | —
Corporate Obligations | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 6,184 | ​ |  | 6,175 | ​ |  | (9)
Total | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 7,674 | ​ | $ | 7,665 | ​ | $ | (9)
Schedule of analysis of warranty accruals | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2019 |  | 2018
Balance at beginning of year | ​ | $ | 5,607 | ​ | $ | 5,373
Less: Payments made during the year | ​ |  | (4,004) | ​ |  | (3,944)
Add: Warranty provision for the current year | ​ |  | 3,788 | ​ |  | 3,901
Changes to warranty provision for prior years | ​ |  | 19 | ​ |  | 277
Balance at end of year | ​ | $ | 5,410 | ​ | $ | 5,607
Schedule of reconciliation of weighted average shares outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In thousands) |  | 2019 |  | 2018 |  | 2017
Net income available for stockholders | ​ | $ | 28,239 | ​ | $ | 28,488 | ​ | $ | 19,300
Less: Adjustments for earnings attributable to participating securities | ​ |  | (669) | ​ |  | (762) | ​ |  | (595)
Net income used in calculating earnings per share | ​ | $ | 27,570 | ​ | $ | 27,726 | ​ | $ | 18,705
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average shares outstanding (including participating securities) | ​ |  | 34,061 | ​ |  | 34,529 | ​ |  | 34,843
Adjustment for participating securities | ​ |  | (831) | ​ |  | (959) | ​ |  | (1,091)
Shares used in calculating diluted earnings per share | ​ |  | 33,230 | ​ |  | 33,570 | ​ |  | 33,752

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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