XML 59 R26.htm IDEA: XBRL DOCUMENT v2.4.0.6

Accounting for Stock- Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Accounting for stock-based compensation [Abstract]

Summarized details of stock-based compensation expense recognized in the accompanying condensed consolidated statements of operations

		Three months ended June  30,								Six months ended June 30,
		2012				2011				2012				2011
Stock-based compensation		$	3,072			$	1,993			$	5,951			$	4,701

Assumptions used to calculate fair of employee stock options

The Company calculated the fair value of employee stock options for the three months ended June 30, 2012 using the following assumptions:

		Performance-based		Time-based
Risk-free interest rate		0.20% — 0.32%		0.74% —1.16%
Expected lives		1.2 — 2.1 years		5.6 — 6.1 years
Volatility		35% — 70%		81% — 83%
Dividends		—		—

X

- Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock
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 employee stock purchase plans, including, but not limited to: (a) expected term, (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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration