Long-Term Debt - Convertible Senior Notes (Details)
|
|
2 Months Ended |
3 Months Ended |
6 Months Ended |
|
May 05, 2015
$ / shares
|
Jun. 30, 2015
USD ($)
|
Jun. 30, 2016
USD ($)
|
Jun. 30, 2015
USD ($)
|
Jun. 30, 2016
USD ($)
|
Jun. 30, 2015
USD ($)
|
| Carrying amount of Notes on the balance sheet: |
|
|
|
|
|
|
| Interest expense |
|
|
$ 3,524,166
|
$ 4,350,256
|
$ 7,027,561
|
$ 4,388,224
|
| Senior convertible notes, including interest |
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
| Stated interest rate |
2.50%
|
|
|
|
|
|
| Conversion ratio |
25.5428
|
|
|
|
|
|
| Conversion price (in usd per share) | $ / shares |
$ 39.15
|
|
|
|
|
|
| Carrying amount of Notes on the balance sheet: |
|
|
|
|
|
|
| Convertible senior notes, principal amount |
|
|
230,000,000
|
|
230,000,000
|
|
| Unamortized debt discount |
|
|
(24,998,630)
|
|
(24,998,630)
|
|
| Unamortized debt issuance costs |
|
|
(4,944,207)
|
|
(4,944,207)
|
|
| Convertible senior notes, net |
|
|
200,057,163
|
|
200,057,163
|
|
| Convertible senior notes, fair value |
|
|
218,800,000
|
|
218,800,000
|
|
| Interest expense |
|
$ 2,100,000
|
|
|
6,300,000
|
|
| Contractual coupon interest |
|
1,000,000
|
|
|
2,900,000
|
|
| Debt discount amortization |
|
900,000
|
|
|
2,800,000
|
|
| Debt issuance cost amortization |
|
$ 200,000
|
|
|
$ 600,000
|
|
| Senior convertible notes, including interest | Level 2 |
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
| Straight debt borrowing rate |
|
|
|
|
5.75%
|
|
| Fair value of liability component |
|
|
198,500,000
|
|
$ 198,500,000
|
|
| Fair value of equity component |
|
|
$ 31,500,000
|
|
$ 31,500,000
|
|
| Effective interest rate |
|
|
6.33%
|
|
6.33%
|
|
| Discount amortization period |
|
|
|
|
5 years
|
|