Financial Statement Detail (Details 2) (USD $)	0 Months Ended	3 Months Ended		12 Months Ended
	Jan. 15, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2014
Summary of prepaid expenses and other
Prepaid contract expense		$ 10,074,000	$ 9,766,000	$ 9,766,000
Deferred commissions		6,038,000	6,665,000	6,665,000
Debt issuance costs		1,425,000	1,438,000	1,438,000
Tenant improvement allowance		1,295,000
Other		10,841,000	7,115,000	7,115,000
Total prepaid expenses and other		29,673,000	24,984,000	24,984,000
Summary of other assets
Debt issuance costs		3,128,000	3,483,000	3,483,000
Deposits		3,108,000	2,915,000	2,915,000
Prepaid contract expense, long-term		3,037,000	3,770,000	3,770,000
Long-term deferred commissions		3,025,000	2,919,000	2,919,000
Other		166,000	158,000	158,000
Total other assets		12,464,000	13,245,000	13,245,000
Restricted cash balance		1,700,000	1,500,000	1,500,000
Cash dividends declared per common share (in dollars per share)			$ 0.13
Payment of quarterly cash dividend	6,800,000
Summary of accrued liabilities
Salaries and benefits payable		16,073,000	21,381,000	21,381,000
Accrued dividend equivalents on restricted stock units		3,834,000	3,404,000	3,404,000
Accrued legal fees		2,984,000	346,000	346,000
Deferred rent, current portion		1,498,000	1,998,000	1,998,000
Accrued restructuring, current portion		1,460,000	61,000	61,000
Other		11,699,000	9,351,000	9,351,000
Total accrued liabilities		$ 37,548,000	$ 36,541,000	$ 36,541,000
Per RSU amount that holders of RSUs will receive upon vesting per equity award modification (in dollars per share)		$ 9.00		$ 9.00