Income Taxes (Unrecognized Tax Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Balance at beginning of period	$ 20,920	$ 19,494
Additions based on tax positions related to the current year	3,290	3,150
Additions for tax positions of prior years	337	1,764
Reductions as a result of settlement with taxing authorities	(975)	(285)
Reductions as a result of the lapse of the applicable statute of limitations		(2,256)
Reduction for tax positions of prior years		(947)
Balance at end of period	$ 23,572	$ 20,920