| **Long Term Debt (Schedule of Redemption Prices) (Details) (Line of Credit [Member])** | 12 Months Ended |
|----------------------------------------------------------------------------------------|-----------------|
||
| 2021 Notes [Member] | Debt Instrument, Redemption, Period One [Member]                 |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 103.375%        |
| 2021 Notes [Member] | Debt Instrument, Redemption, Period Two [Member]                 |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 102.25%         |
| 2021 Notes [Member] | Debt Instrument, Redemption, Period Three [Member]               |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 101.125%        |
| 2021 Notes [Member] | Debt Instrument, Redemption, Period Four [Member]                |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 100.00%         |
| 2019 Notes [Member] | Debt Instrument, Redemption, Period One [Member]                 |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 104.313%        |
| 2019 Notes [Member] | Debt Instrument, Redemption, Period Two [Member]                 |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 102.875%        |
| 2019 Notes [Member] | Debt Instrument, Redemption, Period Three [Member]               |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 101.438%        |
| 2019 Notes [Member] | Debt Instrument, Redemption, Period Four [Member]                |            |
| **Debt Instrument [Line Items]**                                                       |            |
| Redemption price, percentage                                                           | 100.00%         |

| X                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_DebtInstrumentLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823
+ Details**Name:**us-gaap_DebtInstrumentRedemptionPricePercentage**Namespace Prefix:**us-gaap_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**duration |