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Unconditional Purchase Obligations	12 Months Ended
Unconditional Purchase Obligations	Dec. 31, 2015
Unconditional Purchase Obligations (Excluding Capital Stock Redemptions) [Abstract]
Unconditional Purchase Obligations	Unconditional Purchase Obligations The Company has entered into various unconditional purchase obligations which primarily include software licenses and long-term purchase contracts for network, communication and office maintenance services. The Company expended $5.3 million, $2.9 million and $3.3 million related to unconditional purchase obligations that existed as of the beginning of each year for the years ended December 31, 2015, 2014 and 2013, respectively. Future expenditures under unconditional purchase obligations in effect as of December 31, 2015 are $7.2 million in 2016, $1.3 million in 2017 and $0.7 million in 2018.