|
Fair Value Disclosures (Details 1) (Level 2 [Member], USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
|
6.25% senior notes [Member]
|
||
| Fair value of fixed-rate debt | ||
| Aggregate Principal | $ 285,000 | |
| Estimated Fair Value | 278,588 | |
|
7.731% senior subordinated notes [Member]
|
||
| Fair value of fixed-rate debt | ||
| Aggregate Principal | 99,825 | 125,875 |
| Estimated Fair Value | 103,069 | 110,770 |
|
7.15% senior notes [Member]
|
||
| Fair value of fixed-rate debt | ||
| Aggregate Principal | 200,000 | 200,000 |
| Estimated Fair Value | 209,000 | 190,000 |
|
7.00% senior notes [Member]
|
||
| Fair value of fixed-rate debt | ||
| Aggregate Principal | 300,000 | |
| Estimated Fair Value | $ 309,750 |
| X | ||||||||||
|
- Definition
The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|