|
Debt - Summary of Debt (Details) (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
4,421,220 |
$ 3,776,549 |
| Unamortized net debt (discount) or premium |
(51,586) |
1,669 |
| Total debt, net |
4,369,634 |
3,778,218 |
| Revolving Credit Facilities [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
15,181 |
35,120 |
| Revolving Credit Facilities [Member] | Weighted Average [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Weighted average effective interest rates |
4.84% |
|
| Weighted average stated interest rate |
3.58% |
|
| Weighted Average Maturity |
1 year 7 months 6 days |
|
| Master trust notes [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
1,710,380 |
1,241,437 |
| Master trust notes [Member] | Weighted Average [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Weighted average effective interest rates |
5.62% |
|
| Weighted average stated interest rate |
5.04% |
|
| Weighted Average Maturity |
8 years 2 months 12 days |
|
| CMBS - Fixed-Rate [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
1,836,181 |
2,387,532 |
| CMBS - Fixed-Rate [Member] | Weighted Average [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Weighted average effective interest rates |
5.34% |
|
| Weighted average stated interest rate |
5.85% |
|
| Weighted Average Maturity |
3 years 2 months 12 days |
|
| CMBS - Variable-Rate [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
110,685 |
111,018 |
| CMBS - Variable-Rate [Member] | Weighted Average [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Weighted average effective interest rates |
3.50% |
|
| Weighted average stated interest rate |
3.28% |
|
| Weighted Average Maturity |
2 years 8 months 12 days |
|
| Convertible Notes [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
747,500 |
0 |
| Convertible Notes [Member] | Weighted Average [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Weighted average effective interest rates |
4.82% |
|
| Weighted average stated interest rate |
3.28% |
|
| Weighted Average Maturity |
5 years 3 months 18 days |
|
| Unsecured Fixed Rate Promissory Note [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Long-term debt, gross |
1,293 |
$ 1,442 |
| Unsecured Fixed Rate Promissory Note [Member] | Weighted Average [Member] |
|
|
| Debt Instrument [Line Items] |
|
|
| Weighted average effective interest rates |
9.12% |
|
| Weighted average stated interest rate |
7.00% |
|
| Weighted Average Maturity |
7 years |
|