Shareholder Report, Holdings (Details)	Jul. 31, 2025
C000155941 [Member] | Bank of New York Mellon Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[1]
C000155941 [Member] | Howmet Aerospace Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[1]
C000155941 [Member] | Vistra Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[1]
C000155941 [Member] | Cloudflare Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%	[1]
C000155941 [Member] | Hilton Worldwide Holdings Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%	[1]
C000155941 [Member] | Royal Caribbean Cruises Ltd [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%	[1]
C000155941 [Member] | Coinbase Global Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[1]
C000155941 [Member] | ROBLOX Corp Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[1]
C000155941 [Member] | Robinhood Markets Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[1]
C000155941 [Member] | iShares Russell Mid Cap ETF [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%	[1]
C000155941 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.60%	[2]
C000155941 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.30%	[2]
C000155941 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%	[2]
C000155941 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%	[2]
C000155941 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%	[2]
C000155941 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%	[2]
C000155941 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.10%	[2]
C000155941 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.20%	[2]
C000155941 [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[2]
C000155941 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%	[2],[3]
C000155941 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.20%	[2]
C000155941 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(2.80%)	[2]
C000155941 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%	[2]
C000163604 [Member] | Bank of New York Mellon Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[4]
C000163604 [Member] | Howmet Aerospace Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[4]
C000163604 [Member] | Vistra Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[4]
C000163604 [Member] | Cloudflare Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%	[4]
C000163604 [Member] | Hilton Worldwide Holdings Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%	[4]
C000163604 [Member] | Royal Caribbean Cruises Ltd [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%	[4]
C000163604 [Member] | Coinbase Global Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[4]
C000163604 [Member] | ROBLOX Corp Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[4]
C000163604 [Member] | Robinhood Markets Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[4]
C000163604 [Member] | iShares Russell Mid Cap ETF [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%	[4]
C000163604 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.60%	[5]
C000163604 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.30%	[5]
C000163604 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%	[5]
C000163604 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%	[5]
C000163604 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%	[5]
C000163604 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%	[5]
C000163604 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.10%	[5]
C000163604 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.20%	[5]
C000163604 [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[5]
C000163604 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%	[5],[6]
C000163604 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.20%	[5]
C000163604 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(2.80%)	[5]
C000163604 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%	[5]
C000155940 [Member] | Bank of New York Mellon Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[7]
C000155940 [Member] | Howmet Aerospace Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[7]
C000155940 [Member] | Vistra Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[7]
C000155940 [Member] | Cloudflare Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%	[7]
C000155940 [Member] | Hilton Worldwide Holdings Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%	[7]
C000155940 [Member] | Royal Caribbean Cruises Ltd [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%	[7]
C000155940 [Member] | Coinbase Global Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[7]
C000155940 [Member] | ROBLOX Corp Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[7]
C000155940 [Member] | Robinhood Markets Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.60%	[7]
C000155940 [Member] | iShares Russell Mid Cap ETF [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%	[7]
C000155940 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.60%	[8]
C000155940 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.30%	[8]
C000155940 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%	[8]
C000155940 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%	[8]
C000155940 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%	[8]
C000155940 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.20%	[8]
C000155940 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.10%	[8]
C000155940 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.20%	[8]
C000155940 [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[8]
C000155940 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%	[8],[9]
C000155940 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.20%	[8]
C000155940 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(2.80%)	[8]
C000155940 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.50%	[8]
C000159050 [Member] | Microsoft Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.40%	[10]
C000159050 [Member] | Apple Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[10]
C000159050 [Member] | Amazon com Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[10]
C000159050 [Member] | Meta Platforms Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%	[10]
C000159050 [Member] | NVIDIA Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.80%	[10]
C000159050 [Member] | Broadcom Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.20%	[10]
C000159050 [Member] | Alphabet Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%	[10]
C000159050 [Member] | Alphabet Inc Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%	[10]
C000159050 [Member] | Berkshire Hathaway Inc Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%	[10]
C000159050 [Member] | Tesla Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%	[10]
C000159050 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%	[11]
C000159050 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.20%	[11]
C000159050 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%	[11]
C000159050 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%	[11]
C000159050 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%	[11]
C000159050 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%	[11]
C000159050 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.80%	[11]
C000159050 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.30%	[11]
C000159050 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%	[11],[12]
C000159050 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%	[11]
C000159050 [Member] | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.20%	[11]
C000159050 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(1.20%)	[11]
C000159050 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%	[11]
C000159049 [Member] | Microsoft Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.40%	[13]
C000159049 [Member] | Apple Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[13]
C000159049 [Member] | Amazon com Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[13]
C000159049 [Member] | Meta Platforms Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%	[13]
C000159049 [Member] | NVIDIA Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.80%	[13]
C000159049 [Member] | Broadcom Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.20%	[13]
C000159049 [Member] | Alphabet Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%	[13]
C000159049 [Member] | Alphabet Inc Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%	[13]
C000159049 [Member] | Berkshire Hathaway Inc Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%	[13]
C000159049 [Member] | Tesla Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%	[13]
C000159049 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%	[14]
C000159049 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.20%	[14]
C000159049 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%	[14]
C000159049 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%	[14]
C000159049 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%	[14]
C000159049 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%	[14]
C000159049 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.80%	[14]
C000159049 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.30%	[14]
C000159049 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%	[14],[15]
C000159049 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%	[14]
C000159049 [Member] | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.20%	[14]
C000159049 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(1.20%)	[14]
C000159049 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%	[14]
C000159048 [Member] | Microsoft Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.40%	[16]
C000159048 [Member] | Apple Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[16]
C000159048 [Member] | Amazon com Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[16]
C000159048 [Member] | Meta Platforms Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%	[16]
C000159048 [Member] | NVIDIA Corp [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.80%	[16]
C000159048 [Member] | Broadcom Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.20%	[16]
C000159048 [Member] | Alphabet Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%	[16]
C000159048 [Member] | Alphabet Inc Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%	[16]
C000159048 [Member] | Berkshire Hathaway Inc Class B [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%	[16]
C000159048 [Member] | Tesla Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%	[16]
C000159048 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%	[17]
C000159048 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.20%	[17]
C000159048 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.00%	[17]
C000159048 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%	[17]
C000159048 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.60%	[17]
C000159048 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%	[17]
C000159048 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.80%	[17]
C000159048 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	31.30%	[17]
C000159048 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%	[17],[18]
C000159048 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%	[17]
C000159048 [Member] | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.20%	[17]
C000159048 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(1.20%)	[17]
C000159048 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%	[17]
C000159053 [Member] | iShares Russell 2000 ETF [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[19]
C000159053 [Member] | Comfort Systems USA Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[19]
C000159053 [Member] | EMCOR Group Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[19]
C000159053 [Member] | SoFi Technologies Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[19]
C000159053 [Member] | Jabil Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[19]
C000159053 [Member] | Tapestry Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[19]
C000159053 [Member] | NiSource Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[19]
C000159053 [Member] | Astera Labs Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[19]
C000159053 [Member] | Casey s General Stores Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[19]
C000159053 [Member] | Nutanix Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[19]
C000159053 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[20]
C000159053 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.40%	[20]
C000159053 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.90%	[20]
C000159053 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.50%	[20]
C000159053 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%	[20]
C000159053 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[20]
C000159053 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.30%	[20]
C000159053 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.30%	[20]
C000159053 [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[20]
C000159053 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%	[20],[21]
C000159053 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%	[20]
C000159053 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(8.30%)	[20]
C000159053 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%	[20]
C000159051 [Member] | iShares Russell 2000 ETF [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[22]
C000159051 [Member] | Comfort Systems USA Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[22]
C000159051 [Member] | EMCOR Group Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[22]
C000159051 [Member] | SoFi Technologies Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[22]
C000159051 [Member] | Jabil Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[22]
C000159051 [Member] | Tapestry Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[22]
C000159051 [Member] | NiSource Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[22]
C000159051 [Member] | Astera Labs Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[22]
C000159051 [Member] | Casey s General Stores Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[22]
C000159051 [Member] | Nutanix Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[22]
C000159051 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[23]
C000159051 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.40%	[23]
C000159051 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.90%	[23]
C000159051 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.50%	[23]
C000159051 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%	[23]
C000159051 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[23]
C000159051 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.30%	[23]
C000159051 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.30%	[23]
C000159051 [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[23]
C000159051 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%	[23],[24]
C000159051 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%	[23]
C000159051 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(8.30%)	[23]
C000159051 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%	[23]
C000159052 [Member] | iShares Russell 2000 ETF [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[25]
C000159052 [Member] | Comfort Systems USA Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[25]
C000159052 [Member] | EMCOR Group Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[25]
C000159052 [Member] | SoFi Technologies Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[25]
C000159052 [Member] | Jabil Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.40%	[25]
C000159052 [Member] | Tapestry Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[25]
C000159052 [Member] | NiSource Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[25]
C000159052 [Member] | Astera Labs Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[25]
C000159052 [Member] | Casey s General Stores Inc [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[25]
C000159052 [Member] | Nutanix Inc Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%	[25]
C000159052 [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[26]
C000159052 [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	17.40%	[26]
C000159052 [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.90%	[26]
C000159052 [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.50%	[26]
C000159052 [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.90%	[26]
C000159052 [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.70%	[26]
C000159052 [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	20.30%	[26]
C000159052 [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.30%	[26]
C000159052 [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.00%	[26]
C000159052 [Member] | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%	[26],[27]
C000159052 [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.00%	[26]
C000159052 [Member] | Liabilities in Excess of Other Assets [Member]
Holdings [Line Items]
Percent of Net Asset Value	(8.30%)	[26]
C000159052 [Member] | Short-Term Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%	[26]

[1] Excludes short-term securities.

[2] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[3] Ten largest sectors are presented. Additional sectors are found in Other.

[4] Excludes short-term securities.

[5] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[6] Ten largest sectors are presented. Additional sectors are found in Other.

[7] Excludes short-term securities.

[8] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[9] Ten largest sectors are presented. Additional sectors are found in Other.

[10] Excludes short-term securities.

[11] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[12] Ten largest sectors are presented. Additional sectors are found in Other.

[13] Excludes short-term securities.

[14] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[15] Ten largest sectors are presented. Additional sectors are found in Other.

[16] Excludes short-term securities.

[17] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[18] Ten largest sectors are presented. Additional sectors are found in Other.

[19] Excludes short-term securities.

[20] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[21] Ten largest sectors are presented. Additional sectors are found in Other.

[22] Excludes short-term securities.

[23] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[24] Ten largest sectors are presented. Additional sectors are found in Other.

[25] Excludes short-term securities.

[26] For purposes of this report, sector sub-classifications may differ from those utilized by the Fund for compliance purposes.

[27] Ten largest sectors are presented. Additional sectors are found in Other.