Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net income	$ 105,338	$ 237	$ 6,368	$ 1,738	$ 19,945	$ 1,129	$ 1,270	$ 14,706	$ 113,681	$ 37,050	$ 2,216
Unrealized losses on securities held as available for sale, net of tax:
Unrealized net holding losses arising during the period									0	(32)	(373)
Less: Reclassification adjustment for realized gains included in earnings									0	(230)	(2,467)
Foreign currency translation adjustments									(9,952)	2,969	(3,037)
Comprehensive income (loss)									$ 103,729	$ 39,757	$ (3,661)