Income Taxes (Unrecognized Tax Benefit Rollforward) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 7,420	$ 6,611	$ 6,492
Additions based on tax positions related to current year	1,116	709	470
Additions to tax provision of prior years	6	263	4
Reductions to tax provision of prior years	(78)	24	(262)
Lapse of the applicable statute of limitations	(158)	(187)	(93)
Balance at end of year	$ 8,306	$ 7,420	$ 6,611