XML 43 R28.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Summary Of Significant Accounting Policies [Abstract] |
Schedule Of Long-Term Investments Measured At Fair Value Using Significant Unobservable Inputs (Level 3 Inputs) |
(in thousands) |  | 2011 |  |  | 2010 |
Balance as of January 1 |  | $ | 35,297 |  |  | $ | 45,686 |
Net unrealized gains included in other comprehensive income |  |  | 526 |  |  |  | 536 |
Sales of investments at par value |  |  | (11,150 | ) |  |  | (10,925 | )
Balance as of December 31 |  | $ | 24,673 |  |  | $ | 35,297 |
Unrealized losses still held |  | $ | 3,327 |  |  | $ | 3,853 |
Schedule Of Calculation Of Basic And Diluted Earnings Per Share |
|  | Year ended December 31, |
(in thousands, except per share data) |  | 2011 |  |  | 2010 |  |  | 2009 |
Net income |  | $ | 51,959 |  |  | $ | 79,758 |  |  | $ | 53,381 |
Denominator for basic earnings per share – weighted- |  |  |  |  |  |  |  |  |  |  |  |
average number of common shares outstanding |  |  |  |  |  |  |  |  |  |  |  |
during the period |  |  | 59,284 |  |  |  | 62,141 |  |  |  | 64,758 |
Incremental common shares attributable to exercise |  |  |  |  |  |  |  |  |  |  |  |
of outstanding dilutive options |  |  | 270 |  |  |  | 455 |  |  |  | 303 |
Incremental common shares attributable to outstanding |  |  |  |  |  |  |  |  |  |  |  |
restricted shares, restricted stock units and phantom stock |  |  | 219 |  |  |  | 96 |  |  |  | 45 |
Incremental common shares attributable |  |  |  |  |  |  |  |  |  |  |  |
to exercise of warrants |  |  | — |  |  |  | — |  |  |  | 10 |
Denominator for diluted earnings per share |  |  | 59,773 |  |  |  | 62,692 |  |  |  | 65,116 |
Basic earnings per share |  | $ | 0.88 |  |  | $ | 1.28 |  |  | $ | 0.82 |
Diluted earnings per share |  | $ | 0.87 |  |  | $ | 1.27 |  |  | $ | 0.82 |
Summary Of Weighted-Average Assumptions Used To Value Option Grants |
|  | Year ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Stock Options |  |  |  |  |  |  |  |  |
Expected term of options |  | 6.2 years |  |  | 7.0 years |  |  | 5.7 years |
Expected volatility |  |  | 41 | % |  |  | 40 | % |  |  | 41 | %
Risk-free interest rate |  |  | 2.674 | % |  |  | 2.94 | % |  |  | 2.51 | %
Dividend yield |  | zero |  |  | zero |  |  | zero |

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration