Basis of Condensed Consolidated Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Earnings Per Share, Basic	$ 0.37		$ 0.17	$ 0.69	$ 0.15
Earnings Per Share, Diluted	$ 0.36		$ 0.17	$ 0.68	$ 0.14
Marketable securities	$ 23,800			$ 23,800		$ 22,264
Escrow deposit	510,900			510,900		265,600
Reserves Incorrect Disposition Of Assets	$ 20,300			$ 20,300		$ 20,200
Minimum [Member]
Escrow deposits, period held by the Company (in business days)				2 days
Maximum [Member]
Escrow deposits, period held by the Company (in business days)				5 days
Restatement Adjustment [Member]
Earnings Per Share, Basic	$ 0.03
Interest Expense		$ 5,200
Interest Expense Net		$ 3,100
Earnings Per Share, Diluted		$ 0.03