Summary of Significant Accounting Policies Effects of Revision (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
---|---|---|---|---|---|---|
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent | $ 27,189 | $ 25,655 | $ 22,337 | $ 28,933 | $ 33,920 | $ 40,092 |
Assets | 768,164 | 678,479 | 649,264 | 591,908 | 552,423 | 499,050 |
Additional Paid in Capital | 676,605 | 628,034 | 607,240 | 594,489 | 585,648 | 565,946 |
Stockholders' Equity Attributable to Parent | 602,165 | 531,065 | 490,781 | 462,864 | 435,156 | 404,173 |
Scenario, Previously Reported [Member]
|
||||||
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent | 17,612 | 22,945 | 28,546 | 38,024 | ||
Assets | 670,436 | 585,920 | 547,049 | 496,982 | ||
Additional Paid in Capital | 619,991 | 588,501 | 580,274 | 563,878 | ||
Stockholders' Equity Attributable to Parent | 523,022 | 456,876 | 429,782 | 402,105 | ||
Scenario, Adjustment [Member]
|
||||||
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent | 8,043 | 5,988 | 5,374 | 2,068 | ||
Assets | 8,043 | 5,988 | 5,374 | 2,068 | ||
Additional Paid in Capital | 8,043 | 5,988 | 5,374 | 2,068 | ||
Stockholders' Equity Attributable to Parent | $ 8,043 | $ 5,988 | $ 5,374 | $ 2,068 |