Fair Value Measurement:

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Fair Value Measurement [Text Block]

Fair Value Measurement:

The Company’s investment securities, which are carried at fair value and are considered available-for-sale, consist principally of certificates of deposit, corporate bonds, federal tax-exempt state and municipal government debt and sovereign bonds.  As of June 30, 2012, the Company has $6.8 million of its investment securities as Level 1 assets, which are certificates of deposit with quoted prices in active markets and $65.2 million of its investment securities as Level 2 assets, which are pre-refunded municipal securities, non-pre-refunded municipal securities, corporate bonds and sovereign bonds and have observable market based inputs such as quoted prices, interest rates and yield curves. The Company had no Level 3 investments for the three and six months ended June 30, 2012 and June 30, 2011. The following table provides the assets and liabilities carried at fair value measured on a recurring basis.

	Fair value measurements at June 30, 2012 using
	Total carrying value at June 30, 2012		Quoted prices in active markets for identical assets (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)
Available for sale securities	$	71,931	$	6,760	$	65,171	$	—
	$	71,931	$	6,760	$	65,171	$	—

	Fair value measurements at December 31, 2011 using
	Total carrying value at December 31, 2011		Quoted prices in active markets for identical assets (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)
Available for sale securities	$	60,395	$	5,459	$	54,936	$	—
	$	60,395	$	5,459	$	54,936	$	—