v2.4.0.6

Investments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Investments and Fair Value Measurements [Abstract]

Fair value of investments

The following tables summarize the composition of our investments at March 31, 2013 and December 31, 2012 (in thousands):

													Classification on Balance Sheet
March 31, 2013	Amortized Cost				Unrealized Gains (Losses)				Aggregate Fair Value				Cash and cash equivalents				Short-term available-for-sale securities				Long-term available-for-sale securities
Auction rate securities ("ARS"), greater than one year		$	1,000			$	(271	)		$	729			$	-			$	-			$	729
Money market funds, ninety days or less			55				-				55				55				-				-
Municipal securities1
One year or less 2			39,900				61				39,961				-				39,961				-
After one year through three years			1,993				13				2,006				-				2,006				-
Greater than three years			5,664				3				5,667				-				5,667				-
Total		$	48,612			$	(194	)		$	48,418			$	55			$	47,634			$	729
													Classification on Balance Sheet
December 31, 2012	Amortized Cost				Unrealized Gains (Losses)				Aggregate Fair Value				Cash and cash equivalents				Short-term available-for-sale securities				Long-term available-for-sale securities
ARS, greater than one year		$	1,000			$	(277	)		$	723			$	-			$	-			$	723
Money market funds,  ninety days or less			1,150				-				1,150				1,150				-				-
Municipal securities1
One year or less 2			26,885				(1	)			26,884				-				26,884				-
After one year through three years			1,345				7				1,352				-				1,352				-
Greater than three years			3,884				2				3,886				-				3,886				-
Total		$	34,264			$	(269	)		$	33,995			$	1,150			$	32,122			$	723

1Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

²Amounts include short-term municipal security funds that do not have a set maturity date. The aggregate fair value of short-term municipal securities was $39.2 million and $26.1 million as of March 31, 2013, and December 31, 2012, respectively.

Fair value by balance sheet grouping

The following table details the fair value measurements of assets and liabilities within the three levels of the fair value hierarchy at March 31, 2013 and December 31, 2012 (in thousands):

					Fair Value Measurements at Reporting Date Using
March 31, 2013	Fair Market Value				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Other Unobservable Inputs (Level 3)
Financial assets:
ARS		$	729			$	-			$	-			$	729
Money market funds			55				55				-				-
Municipal securities1			47,634				47,634				-				-
Foreign currency exchange contracts			401				-				401				-
Total financial assets		$	48,819			$	47,689			$	401				729
Financial liabilities:
Foreign currency exchange contracts			346				-				346				-
Total financial liabilities		$	346			$	-			$	346			$	-
					Fair Value Measurements at Reporting Date Using
December 31, 2012	Fair Market Value				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Other Unobservable Inputs (Level 3)
Financial assets:
ARS		$	723			$	-			$	-			$	723
Money market funds			1,150				1,150				-				-
Municipal securities1			32,122				32,122				-				-
Foreign currency exchange contracts			952				-				952				-
Total financial assets		$	34,947			$	33,272			$	952			$	723
Financial liabilities:
Foreign currency exchange contracts			115				-				115				-
Total financial liabilities		$	115			$	-			$	115			$	-

1At March 31, 2013, municipal securities consisted of a 83/11/6 percent split between holdings in short-term municipal security funds, municipal revenue bonds and municipal general obligation bonds, respectively. At December 31, 2012, municipal securities consisted of an 82/12/6 split between holdings in short-term municipal security funds, municipal revenue bonds and municipal general obligation bonds, respectively. The underlying credit rating of the municipal securities at March 31, 2013 and December 31, 2012 were A+, A1 or better as defined by S&P 500 and Moody's, respectively.

Fair value of Level 3 assets measured on a recurring basis

Fair value measurements on a recurring basis using Level 3 inputs consist of one available-for-sale ARS. The following table presents a reconciliation for the three months ended March 31, 2013 and 2012, of available-for-sale ARS measured at fair value on a recurring basis using Level 3 inputs (in thousands):

		Three months ended March 31,
		2013				2012
Beginning balance		$	723			$	700
Total realized / unrealized losses:
Included in earnings			-				-
Included in OCI			6				3
Sales and settlements			-				-
Ending balance		$	729			$	703

Realized gains and losses included in accumulated other comprehensive income

The following table summarizes the balances of AOCI and the gain recognized in other comprehensive income ("OCI") related to unrealized gains and losses for available-for-sale securities in the periods indicated (in thousands):

	Accumulated Other Comprehensive Income
	Available-for-sale securities
	2013				2012
Balance, January 1,		$	(180	)		$	135
Other comprehensive income, net of income taxes			48				107
Balance, March 31,		$	(132	)		$	242

X

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring and/or nonrecurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

No definition available.

+ Details

Name:	epax_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisAociTableTextBlock
Namespace Prefix:	epax_
Data Type:	nonnum:textBlockItemType
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 (loss), 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, issues, 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 Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258



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=7578670&loc=d3e19279-110258



Reference 3: 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.

+ Details

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

X

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 14

-Subparagraph a

-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 Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph c(2), d, e, f

-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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15

-Subparagraph b-d

-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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 19

-Subparagraph a, b, c(1), d(1)

-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 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258



Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610



Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph a, c(1), c(2), c(3), d

-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 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-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 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611



Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

+ Details

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

X

- Details

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

X

- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258

+ Details

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