|
Long Term Debt - Advances and Repayments (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Credit Facilities [Line Items] | |||
| Advances on revolving credit facility | $ 1,446,000 | $ 958,355 | $ 496,500 |
| Payments on revolving credit facilities | (1,137,000) | (1,565,537) | (226,819) |
| OLLC Revolving Credit Facility [Member] | |||
| Credit Facilities [Line Items] | |||
| Advances on revolving credit facility | 1,446,000 | 941,000 | 293,000 |
| Payments on revolving credit facilities | (1,137,000) | (1,209,000) | (42,000) |
| Previous Owners Revolving Credit Facility [Member] | |||
| Credit Facilities [Line Items] | |||
| Advances on revolving credit facility | 17,355 | 203,500 | |
| Payments on revolving credit facilities | $ (356,537) | $ (184,819) | |