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Stock Options, Stock Appreciation Rights, Restricted Shares and Salary Stock Units (Details)
12 Months Ended
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]          
Number of equity incentive plan         2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         672,000
Vesting period 5 years        
Exercisable period 10 years        
Number [Roll Forward]          
Outstanding, Beginning Balance (in shares) 550,490 1,251,601 698,488    
Options assumed upon acquisition of CapitalMark (in shares)     858,148    
Granted (in shares) 0 0 0    
Exercised (in shares) (275,904) (698,673) (303,754)    
Forfeited (in shares) 0 (3) (5)    
Outstanding, Ending Balance (in shares) 274,586 550,490 1,251,601 698,488  
Options exercisable (in shares)         274,586
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]          
Outstanding, Beginning Balance (in dollars per share) | $ / shares $ 20.75 $ 21.23 $ 26.89    
Granted (in dollars per share) | $ / shares 0.00 0.00 0.00    
Exercised (in dollars per share) | $ / shares 20.09 21.63 24.09    
Forfeited (in dollars per share) | $ / shares 0.00 29.50 23.88    
Outstanding, Ending Balance (in dollars per share) | $ / shares $ 21.40 $ 20.75 $ 21.23 $ 26.89  
Options exercisable (in dollars per share) | $ / shares         $ 21.40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]          
Outstanding 3 years 22 days        
Options exercisable 3 years 22 days        
Aggregate intrinsic value [Abstract]          
Outstanding | $         $ 12,329,000.000
Options exercisable | $         $ 12,329,000.000
Quoted closing price of common stock (in dollars per share) | $ / shares         $ 66.30
Number Of Shares Settled During Period Stock Appreciation Rights Exercised   1,137 559    
Number of shares settled during period Stock Swap 277        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ $ 12,300,000 $ 21,700,000 $ 7,600,000    
Share-based Compensation [Abstract]          
Stock compensation expense | $ 19,538,000 10,971,000 6,033,000    
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense | $ 7,665,000 4,306,000 2,368,000    
Allocated Share-based Compensation Expense, Net of Tax | $ $ 11,873,000 $ 6,665,000 $ 3,665,000    
Number [Roll Forward]          
Unvested, beginning of period (in shares) 820,539 866,314 849,198    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 261,942 177,664 231,504    
Stock Issued During Period, Shares, Conversion of Units 43,680 43,694 43,711    
Restrictions lapsed and shares released to associates/directors (in shares) (292,896) (245,873) (240,102)    
Shares forfeited by participants (in shares) (34,020) (21,260) (17,997)    
Unvested, end of period (in shares) 936,135 820,539 866,314 849,198  
Grant date weighted average cost [Roll Forward]          
Unvested, beginning of period (in dollars per share) | $ / shares $ 36.47 $ 31.39 $ 24.26    
Shares awarded (in dollars per share) | $ / shares 67.14 48.61 45.71    
Conversion of restricted share units to restricted share awards (in dollars per share) | $ / shares 69.40 46.37 34.50    
Restrictions lapsed and shares released to associates/directors (in dollars per share) | $ / shares 37.59 28.39 23.00    
Shares forfeited (in dollars per share) | $ / shares 54.71 39.88 30.01    
Unvested, end of period (in dollars per share) | $ / shares $ 50.08 $ 36.47 $ 31.39 $ 24.26  
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years   5 years 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 261,942 177,664 231,504    
Shares forfeited by participants (in shares) (34,020) (21,260) (17,997)    
Shares Unvested (in shares) 820,539 866,314 849,198 849,198 936,135
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 261,942 177,664 231,504    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 261,942 177,664 231,504    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years        
Stock-based compensation expense | $ $ 19,538,083 $ 10,970,849 $ 7,341,603    
CapitalMark Bank & Trust [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]          
Granted (in dollars per share) | $ / shares     $ 17.62    
Bank of North Carolina [Member]          
Grant date weighted average cost [Roll Forward]          
Shares awarded (in dollars per share) | $ / shares $ 67.25        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Acquisitions in Period 136,890        
Leadership Team [Member]          
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years     5 years    
Leadership Team [Member] | CapitalMark Bank & Trust [Member]          
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years     3 years    
Employee Stock Option [Member]          
Number [Roll Forward]          
Outstanding, Ending Balance (in shares) 274,586        
Stock Swap [Member]          
Number [Roll Forward]          
Exercised (in shares)   750      
Stock Appreciation Rights [Member]          
Number [Roll Forward]          
Exercised (in shares)   (2,435) (1,276)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]          
Exercised (in dollars per share) | $ / shares   $ 15.60 $ 15.60    
Time Based Awards 2015 [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     190,528    
Shares forfeited by participants (in shares) (19,136)        
Unvested, end of period (in shares) 98,413        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     190,528    
Restrictions lapsed and shares released to participants (in shares) 53,574        
Shares withheld for taxes by participants (in shares) 19,405        
Shares forfeited by participants (in shares) (19,136)        
Shares Unvested (in shares) 98,413       98,413
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     190,528    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     190,528    
Time Based Awards 2015 [Member] | Leadership Team [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     16,605    
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 13,287        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     16,605    
Restrictions lapsed and shares released to participants (in shares) 2,530        
Shares withheld for taxes by participants (in shares) 788        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 13,287       13,287
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     16,605    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     16,605    
Time Based Awards 2016 [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   143,273      
Shares forfeited by participants (in shares) (15,126)        
Unvested, end of period (in shares) 101,341        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   143,273      
Restrictions lapsed and shares released to participants (in shares) 19,490        
Shares withheld for taxes by participants (in shares) 7,316        
Shares forfeited by participants (in shares) (15,126)        
Shares Unvested (in shares) 101,341       101,341
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   143,273      
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   143,273      
Time Based Awards 2017          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 248,265        
Shares forfeited by participants (in shares) (14,085)        
Unvested, end of period (in shares) 233,594        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 248,265        
Restrictions lapsed and shares released to participants (in shares) 388        
Shares withheld for taxes by participants (in shares) 198        
Shares forfeited by participants (in shares) (14,085)        
Shares Unvested (in shares) 233,594       233,594
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 248,265        
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 248,265        
Time Based Awards 2017 | Bank of North Carolina [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 136,890        
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 96,573        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 136,890        
Restrictions lapsed and shares released to participants (in shares) 40,317        
Shares withheld for taxes by participants (in shares) 0        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 96,573       96,573
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 136,890        
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 136,890        
Time Based Awards 2017 | Minimum          
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years 3 years        
Time Based Awards 2017 | Minimum | Bank of North Carolina [Member]          
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years 3 years        
Time Based Awards 2017 | Maximum          
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years 5 years        
Time Based Awards 2017 | Maximum | Bank of North Carolina [Member]          
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years 5 years        
Performance Based Awards 2015 [Member] | Leadership Team [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     43,711    
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 43,711        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years     5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     43,711    
Restrictions lapsed and shares released to participants (in shares) 0        
Shares withheld for taxes by participants (in shares) 0        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 43,711       43,711
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     43,711    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     43,711    
Performance Based Awards 2015 [Member] | Leadership Team [Member] | CapitalMark Bank & Trust [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     11,302    
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 7,537        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     11,302    
Restrictions lapsed and shares released to participants (in shares) 2,679        
Shares withheld for taxes by participants (in shares) 1,086        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 7,537       7,537
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     11,302    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     11,302    
Performance Based Awards 2016 [Member] | Leadership Team [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   43,694      
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 43,694        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years   3 years      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   43,694      
Restrictions lapsed and shares released to participants (in shares) 0        
Shares withheld for taxes by participants (in shares) 0        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 43,694       43,694
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   43,694      
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   43,694      
Performance Based Awards 2016 [Member] | Leadership Team [Member] | Avenue Financial Holdings, Inc. (Avenue) [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   15,468      
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 15,468        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years   3 years      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   15,468      
Restrictions lapsed and shares released to participants (in shares) 0        
Shares withheld for taxes by participants (in shares) 0        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 15,468       15,468
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   15,468      
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   15,468      
Performance Based Awards 2017 | Leadership Team [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 43,680        
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 43,680        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years 3 years        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 43,680        
Restrictions lapsed and shares released to participants (in shares) 0        
Shares withheld for taxes by participants (in shares) 0        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 43,680       43,680
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 43,680        
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 43,680        
Outside Director Awards 2015 [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     13,069    
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 0        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years     1 year    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     13,069    
Restrictions lapsed and shares released to participants (in shares) 11,298        
Shares withheld for taxes by participants (in shares) 1,771        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 0       0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     13,069    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     13,069    
Outside Director Awards 2016 [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   18,923      
Shares forfeited by participants (in shares) (1,186)        
Unvested, end of period (in shares) 0        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years   1 year      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   18,923      
Restrictions lapsed and shares released to participants (in shares) 15,471        
Shares withheld for taxes by participants (in shares) 2,266        
Shares forfeited by participants (in shares) (1,186)        
Shares Unvested (in shares) 0       0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   18,923      
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   18,923      
Outside Director Awards 2017          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 13,677        
Shares forfeited by participants (in shares) 0        
Unvested, end of period (in shares) 10,505        
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Vesting Period in years 1 year        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 13,677        
Restrictions lapsed and shares released to participants (in shares) 2,376        
Shares withheld for taxes by participants (in shares) 796        
Shares forfeited by participants (in shares) 0        
Shares Unvested (in shares) 10,505       10,505
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 13,677        
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 13,677        
Restricted Stock Units (RSUs) [Member]          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 24,916 26,683 28,378 29,087  
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 24,916 26,683 28,378 29,087  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 24,916 26,683 28,378 29,087  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 24,916 26,683 28,378 29,087  
Restricted Stock Units (RSUs) [Member] | Minimum          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 72,537 73,474 58,200 58,404  
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 72,537 73,474 58,200 58,404  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 72,537 73,474 58,200 58,404  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 72,537 73,474 58,200 58,404  
Restricted Stock Units (RSUs) [Member] | Maximum          
Number [Roll Forward]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 109,339 110,223 101,850 102,209  
Restricted stock grants grouped by similar vesting criteria [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 109,339 110,223 101,850 102,209  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 109,339 110,223 101,850 102,209  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 109,339 110,223 101,850 102,209  
Tranche 2014 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       5 years  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       5 years  
Shares settled into RSAs as of period end (in shares)       21,856  
Tranche 2014 (1) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       4 years  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       4 years  
Shares settled into RSAs as of period end (in shares)       21,856  
Tranche 2015 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     2 years 4 years  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     2 years 4 years  
Holding period per tranche     3 years    
Shares settled into RSAs as of period end (in shares)       21,847  
Tranche 2015 (1) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       3 years  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       3 years  
Shares settled into RSAs as of period end (in shares)       21,847  
Tranche 2016 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   2 years 2 years 3 years  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   2 years 2 years 3 years  
Holding period per tranche   3 years 2 years    
Shares settled into RSAs as of period end (in shares)       21,840  
Tranche 2016 (1) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       2 years  
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       2 years  
Shares settled into RSAs as of period end (in shares)       21,840  
Tranche 2017 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 2 years 2 years 2 years    
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years 2 years 2 years    
Holding period per tranche 3 years 2 years 1 year    
Tranche 2018 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 2 years 2 years      
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years 2 years      
Holding period per tranche 2 years 1 year      
Tranche 2019 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 2 years        
Restricted Stock Units [Abstract]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years        
Holding period per tranche 1 year