|
Convertible Notes (Details) (USD $)
|
12 Months Ended |
3 Months Ended |
12 Months Ended |
|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2013
4.75 % Convertible Senior Notes due in 2016
|
Dec. 31, 2013
4.75 % Convertible Senior Notes due in 2016
|
Dec. 31, 2012
4.75 % Convertible Senior Notes due in 2016
|
| Convertible Notes |
|
|
|
|
|
|
| Aggregate principal amount of debt outstanding |
$ 14,197,000 |
$ 59,215,000 |
|
|
|
|
| Interest rate, stated percentage |
|
|
|
4.75% |
4.75% |
|
| Fair value |
20,300,000 |
58,000,000 |
|
|
|
|
| Debt Conversion, Converted Instrument, Amount |
45,018,000 |
0 |
0 |
45,000,000 |
|
|
| Debt Conversion, Converted Instrument, Shares Issued |
|
|
|
5,837,015 |
|
|
| Accrued interest paid upon debt conversion |
|
|
|
300,000 |
|
|
| Cash and stock premium paid upon debt conversion |
|
|
|
4,800,000 |
|
|
| Reclassification of deferred debt issuance cost to additional paid-in capital |
1,037,000 |
0 |
0 |
1,000,000 |
|
|
| Percentage of the conversion price that the closing price of the entity's common stock must exceed in order for the notes to be convertible |
|
|
|
130.00% |
130.00% |
|
| Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable |
|
|
|
|
20 days |
|
| Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be redeemable |
|
|
|
|
30 days |
|
| Number of trading days prior to the date on which the entity provides notice of redemption |
|
|
|
|
5 days |
|
| Redemption price as percentage of principal amount of notes, plus accrued and unpaid interest |
|
|
|
|
100.00% |
|
| Conversion rate of common stock per $1000 of principal amount of convertible notes (in shares) |
|
|
|
|
129.6596 |
|
| Principal amount used for computation of conversion ratio |
|
|
|
1,000 |
1,000 |
|
| Conversion price (in dollars per share) |
|
|
|
$ 7.71 |
$ 7.71 |
|
| Convertible debt issuance costs, current portion |
129,000 |
536,000 |
|
100,000 |
100,000 |
500,000 |
| Debt issuance costs, recorded in deposits and other assets |
|
|
|
$ 200,000 |
$ 200,000 |
$ 1,300,000 |