Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 25,376	$ 0
Fair Value, Measurements, Recurring [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	25,376	0
Fair Value, Measurements, Recurring [Member] \| Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	18,692	0
Fair Value, Measurements, Recurring [Member] \| Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	6,684	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	25,376	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	18,692	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	6,684	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 0	$ 0

Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

$ 25,376

$ 0

Fair Value, Measurements, Recurring [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

25,376

Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

18,692

Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

6,684

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal Bonds [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

25,376

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

18,692

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

6,684

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal Bonds [Member]

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities, Fair Value Disclosure

$ 0

- 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. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details