Related Party Disclosures (Detail Textuals) $ in Millions  | 
1 Months Ended | 
|---|---|
| 
 Mar. 31, 2018  
USD ($)  
shares 
 | |
| Related Party Transactions [Abstract] | |
| Number of ordinary shares | shares | 4,722,312 | 
| Value of shares to be issued under repurchase program | $ | $ 263.5 | 
| X | ||||||||||
- Definition Number of shares of common stock issued as dividends during the period. Excludes stock splits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- References No definition available. 
  | 
| X | ||||||||||
- Definition Amount remaining of a stock repurchase plan authorized. No definition available. 
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