XML 47 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The Company calculated the fair value for options with the following weighted-average assumptions for 2018, 2017, and 2016:
Fair Value Calculation Assumptions for Stock Compensation |  |  |  |  |  |
|  | December 31, |  |  |  |
|  | 2018 |  | 2017 |  | 2016
Risk-free interest rate |  | 2.94 | % |  | 2.23 | % |  | 1.54 | %
Dividend yield |  | 0.5 | % |  | 0.5 | % |  | 0.6 | %
Volatility factors |  | 34.5 | % |  | 37.6 | % |  | 48.5 | %
Weighted-average expected life |  | 8.0 years |  | 8.0 years |  | 8.0 years

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration