Basis of Condensed Consolidated Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Earnings Per Share, Basic	$ 0.32		$ 0.51	$ 1.01	$ 0.64
Earnings Per Share, Diluted	$ 0.31		$ 0.50	$ 1.00	$ 0.64
Marketable securities	$ 22,613			$ 22,613		$ 22,264
Escrow deposit	1,900,000			1,900,000		265,600
Reserves Incorrect Disposition Of Assets	$ 21,500			$ 21,500		$ 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