Commitments and Contingencies (Details) (USD $)	0 Months Ended			12 Months Ended
	Jul. 18, 2013	Dec. 09, 2009	Aug. 06, 1999	Dec. 31, 2014
Loss Contingencies [Line Items]
Toll charges and fees to remediate IRC Section 7702 issue				$ 10,100,000
Cost of claim and reserve liabilities to remediate IRC Section 7702 issue				1,300,000
Total costs to remediate IRC Section 7702 issue				11,400,000
Date of Lawsuit Filed			Aug. 06, 1999
Number of Non U.S. Trusts			2
Date of Trial Court Ruling		Dec. 09, 2009
Loss Contingency, Settlement Agreement, Date	July 18, 2013
Loss Contingency, Damages Awarded, Value	183,000
IRC Section 7702 remediation costs [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Minimum				500,000
Loss Contingency, Range of Possible Loss, Maximum				800,000
Minimum [Member]
Loss Contingencies [Line Items]
Cost Range to Remediate IRC Section 7702 Issue				11,400,000
Maximum [Member]
Loss Contingencies [Line Items]
Cost Range to Remediate IRC Section 7702 Issue				$ 40,000,000