|
Partners' Capital, Equity and Incentive Compensation Plans - Summary of Assumptions and Fair Values for Class O Units, Class RS Units, Restricted Stock and Options to Purchase Shares of Class A Common Stock Granted (Detail) (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of Restricted stock granted |
$ 21.00 |
|
|
| Expected term (years) |
|
4 years |
4 years |
| Expected volatility |
|
55.00% |
60.00% |
| Expected Dividend yield |
5.50% |
0.00% |
0.00% |
| Expected Risk-free interest rates |
|
0.17% |
0.61% |
|
Class RS Units [Member]
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of Units granted |
|
$ 7.15 |
$ 6.95 |
|
Class O Units [Member]
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of Units granted |
|
|
$ 2.94 |
|
Minimum [Member]
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of options granted |
$ 3.45 |
|
|
| Expected term (years) |
5 years 6 months |
|
|
| Expected volatility |
32.00% |
|
|
| Expected Risk-free interest rates |
1.40% |
|
|
|
Minimum [Member] | Class O Units [Member]
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of Units granted |
$ 10.26 |
$ 1.79 |
|
|
Maximum [Member]
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of options granted |
$ 3.52 |
|
|
| Expected term (years) |
7 years |
|
|
| Expected volatility |
40.00% |
|
|
| Expected Risk-free interest rates |
1.80% |
|
|
|
Maximum [Member] | Class O Units [Member]
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Fair value of Units granted |
$ 10.92 |
$ 2.32 |
|