Employee Benefit Plans - Schedule of Stock Options Outstanding and Exercisable (Detail) (USD $)
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12 Months Ended |
Dec. 31, 2014
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Exercise Price Range $4.70 - $15.88 [Member] |
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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Number of Options Outstanding |
2,122,427us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeOneMember |
Exercise Price Lower Range Outstanding |
$ 4.70us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeOneMember |
Exercise Price Upper Range Outstanding |
$ 15.88us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeOneMember |
Weighted Average Exercise Price Outstanding |
$ 13.37us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeOneMember |
Weighted Average Remaining Life Outstanding (in years) |
2 years 10 months 24 days |
Number of Options Exercisable |
2,122,427us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeOneMember |
Weighted Average Exercise Price |
$ 13.37us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeOneMember |
Exercise Price Range $17.11 - $23.83 [Member] |
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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Number of Options Outstanding |
2,290,827us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeTwoMember |
Exercise Price Lower Range Outstanding |
$ 17.11us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeTwoMember |
Exercise Price Upper Range Outstanding |
$ 23.83us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeTwoMember |
Weighted Average Exercise Price Outstanding |
$ 21.42us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeTwoMember |
Weighted Average Remaining Life Outstanding (in years) |
6 years 7 months 6 days |
Number of Options Exercisable |
1,220,640us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeTwoMember |
Weighted Average Exercise Price |
$ 20.84us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeTwoMember |
Exercise Price Range $24.59 - $30.07 [Member] |
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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Number of Options Outstanding |
1,373,850us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeThreeMember |
Exercise Price Lower Range Outstanding |
$ 24.59us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeThreeMember |
Exercise Price Upper Range Outstanding |
$ 30.07us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeThreeMember |
Weighted Average Exercise Price Outstanding |
$ 24.93us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeThreeMember |
Weighted Average Remaining Life Outstanding (in years) |
7 years 4 months 10 days |
Number of Options Exercisable |
592,500us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeThreeMember |
Weighted Average Exercise Price |
$ 24.80us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeThreeMember |
Exercise Price Range $40.00 - $40.00 [Member] |
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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Number of Options Outstanding |
1,523,750us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFourMember |
Exercise Price Lower Range Outstanding |
$ 40.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFourMember |
Exercise Price Upper Range Outstanding |
$ 40.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFourMember |
Weighted Average Exercise Price Outstanding |
$ 40.00us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFourMember |
Weighted Average Remaining Life Outstanding (in years) |
8 years 1 month 24 days |
Number of Options Exercisable |
282,000us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFourMember |
Weighted Average Exercise Price |
$ 40.00us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFourMember |
Exercise Price Range $42.74 - $53.26 [Member] |
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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Number of Options Outstanding |
1,551,700us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFiveMember |
Exercise Price Lower Range Outstanding |
$ 42.74us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFiveMember |
Exercise Price Upper Range Outstanding |
$ 53.26us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFiveMember |
Weighted Average Exercise Price Outstanding |
$ 50.45us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFiveMember |
Weighted Average Remaining Life Outstanding (in years) |
9 years 1 month 6 days |
Number of Options Exercisable |
65,750us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFiveMember |
Weighted Average Exercise Price |
$ 43.54us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeFiveMember |
Exercise Price Range $57.00 - $57.95 [Member] |
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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Number of Options Outstanding |
262,400us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeSixMember |
Exercise Price Lower Range Outstanding |
$ 57.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeSixMember |
Exercise Price Upper Range Outstanding |
$ 57.95us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeSixMember |
Weighted Average Exercise Price Outstanding |
$ 57.42us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = q_ExercisePriceRangeSixMember |
Weighted Average Remaining Life Outstanding (in years) |
9 years 10 months 28 days |