Stockholders' Equity (Share-Based Payments - Exercise Range) (Details)
$ / shares in Units, $ in Thousands |
12 Months Ended |
|
Dec. 31, 2016
USD ($)
$ / shares
shares
|
|---|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
96,446
|
| Options Exercisable (in shares) |
52,580
|
| Number Outstanding, Aggregate intrinsic value | $ |
$ 11,906
|
| Options Exercisable, Aggregate intrinsic value | $ |
$ 6,959
|
| Share Price (in usd per share) | $ / shares |
$ 310.80
|
| Employee Stock Option | 255.13 (options) |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
13,268
|
| Weighted-Average Remaining Contractual Life (in years) |
1 year 3 months 18 days
|
| Options Exercisable (in shares) |
13,268
|
| Exercise Price (in usd per share) | $ / shares |
$ 255.13
|
| Employee Stock Option | 208.05 (options) |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
6,000
|
| Weighted-Average Remaining Contractual Life (in years) |
1 year 6 months
|
| Options Exercisable (in shares) |
6,000
|
| Exercise Price (in usd per share) | $ / shares |
$ 208.05
|
| Stock Appreciation Rights (SARs) | 114.64 (SARs) |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
12,150
|
| Weighted-Average Remaining Contractual Life (in years) |
2 years 1 month 6 days
|
| Options Exercisable (in shares) |
12,150
|
| Exercise Price (in usd per share) | $ / shares |
$ 114.64
|
| Stock Appreciation Rights (SARs) | 132.56 (SARs) |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
22,068
|
| Weighted-Average Remaining Contractual Life (in years) |
5 years
|
| Options Exercisable (in shares) |
14,062
|
| Exercise Price (in usd per share) | $ / shares |
$ 132.56
|
| Stock Appreciation Rights (SARs) | 210.22 (SARs) |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
29,100
|
| Weighted-Average Remaining Contractual Life (in years) |
6 years 10 months 24 days
|
| Options Exercisable (in shares) |
7,100
|
| Exercise Price (in usd per share) | $ / shares |
$ 210.22
|
| Stock Appreciation Rights (SARs) | 216.48 (SARs) |
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
| Number Outstanding (in shares) |
13,860
|
| Weighted-Average Remaining Contractual Life (in years) |
9 years 1 month 6 days
|
| Options Exercisable (in shares) |
0
|
| Exercise Price (in usd per share) | $ / shares |
$ 216,480.00
|