|
Debt and Interest Rate Swaps - 2020 Convertible Notes (Details) (Convertible Debt [Member], 2020 Convertible Notes [Member], USD $)
|
0 Months Ended |
3 Months Ended |
|
|
Mar. 04, 2015
|
Mar. 31, 2015
trading_day
|
Mar. 04, 2015
|
| Debt Instrument [Line Items] |
|
|
|
| Debt issued |
$ 345,000,000 |
|
$ 345,000,000 |
| Interest rate of debt, stated percentage |
0.50% |
0.50% |
0.50% |
| Initial conversion price (in usd per share) |
$ 28.9044 |
|
$ 28.9044 |
| Shares issued per $1,000 principal amount |
0.0345968 |
|
|
| Threshold trading days |
|
20 |
|
| Consecutive trading days |
|
30 days |
|
| Minimum percentage of common stock price on applicable conversion price resulting in the noteholders ability to convert the notes into cash or stock |
|
130.00% |
|
| Threshold business days |
|
5 days |
|
| Measurement period |
|
10 days |
|
| Maximum percentage of product under last reported sale price for conversion eligibility |
|
98.00% |
|
| Convertible notes, percentage of principal to be paid on notes redeemed |
|
100.00% |
|
| Non-convertible borrowing rate (percent) |
4.75% |
|
4.75% |
| Interest expense |
|
900,000 |
|
| Deferred finance costs |
9,400,000 |
|
9,400,000 |
| Other Assets [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Deferred finance costs |
7,700,000 |
|
7,700,000 |
| Additional paid-in capital [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Deferred finance costs |
$ 1,700,000 |
|
$ 1,700,000 |