Income Taxes - Reconciliation of Unrecognized Tax Benefits Related to Uncertain Tax Positions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 2,679
Gross increases – tax positions prior periods	1,356
Gross decreases – tax positions prior periods	0
Gross increases – tax positions current period	0
Gross decreases – tax positions current period	0
Decreases – settlements with taxing authorities	0
Reductions - lapse of statute of limitations	0
Unrecognized Tax Benefits, Ending Balance	$ 4,035